ors

JHR 36: 27-51 (2014) JOURNAL OF | *2erriewed opevaccersjoural
Seen (f) Hymenoptera

www.pensoft.net/journals/jhr The imernatonl Society of Hymenopexriss, RESEARCH

Review of the genus Tersilochus Holmgren
(Hymenoptera, Ichneumonidae, Tersilochinae)
from South Korea

Andrey I. Khalaim!*, Ekaterina N. Balueva**, Ki-Beom Kim35, Jong-Wook Lee?!

I Zoological Institute, Russian Academy of Sciences, Universitetskaya Emb. 1, St. Petersburg 199034, Russia
2 Facultad de Ingenieria y Ciencias, Universidad Auténoma de Tamaulipas, Cd. Victoria 87149, Mexico
3 Department of Life Sciences, Yeungnam University, Gyeongsan, 712-749, Republic of Korea

T Attp://zoobank.org/DAI4AC5D-536B-44CD-8BA2-456C71DECB42
* Attp://zoobank.org/1 CEA91 FO-FE13-4754-BFB8-DDA39928E17A
§ hitp://zoobank. org/4207 BF40-A6A6-4CDF-8A53-38ACFAEA00D2
| Attp://zoobank. org/29BOEAD6-5F06-46DA-A384-69FDE8 CBEF34

Corresponding author: Jong-Wook Lee (jwlee1@ynu.ac.kr)

Academic editor: G. Broad| Received 2 November 2013 | Accepted 2 January 2014 | Published 14 February 2014
http://zoobank.org/EA8AOBAB-634F-4860-9E75-F8FB53179509

Citation: Khalaim Al, Balueva EN, Kim K-B, Lee J-W (2014) Review of the genus Tersilochus Holmgren (Hymenoptera,
Ichneumonidae, Tersilochinae) from South Korea. Journal of Hymenoptera Research 36: 27-51. doi: 10.3897/
JHR.36.6548

Abstract

Ten species of the genus Tersilochus are found to occur in South Korea. Eight species belonging to the sub-
genus Tersilochus are described as new: T. fidicinus sp. n., T. gangwonus sp. n., T. iracundus sp. n., T. nigel-
lus sp. n., T. obstinatus sp. n., T. punctator sp. n., T. serratus sp. n., and T. uncinatus sp. n. One abundant
and widely distributed Palaearctic species, ZT’ (Gonolochus) caudatus Holmgren, is recorded from South
Korea for the first time. A key to 10 South Korean species of the genus Tersilochus is provided. Recently

discovered finger-shaped flagellar structures are found and described in all Korean species of Tersilochus.

Keywords

Tersilochus, Tersilochinae, Palaearctic region, South Korea, taxonomy, key

Copyright Andrey I. Khalaim et al. This is an open access article distributed under the terms of the Creative Commons Attribution International License
(CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

28 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

Introduction

Extensive study of South Korean Tersilochinae was initiated 2 years ago by A. Khalaim
and co-authors based on materials from Yeungnam University (Gyeongsan, South Ko-
rea). Six Tersilochinae genera were recognized in the Korean fauna, and four of them,
Barycnemis Forster (two species), Diaparsis Forster (11 species, including one new species
and two unidentified species), Gelanes Horstmann (eight species, including four new
species), and Phradis Forster (two species), have been reviewed in three papers (Balueva
et al. 2013a, 2013b; Kim et al. 2013). The genus Prodles Forster was also partly revised;
three new species of this genus are described (Khalaim et al. 2013) and one abundant
species will be described in our forthcoming paper (Balueva et al., unpublished).

In this paper, we review one of the largest tersilochine genera, Tersilochus Hol-
mgren. This predominantly Holarctic genus comprises three subgenera with about 65
species: Gonolochus Forster (six species), Pectinolochus Aubert (19 species), and Tersilo-
chus s. str. (40 species). Most species of the genus Tersilochus occur in Europe (Horst-
mann 1971, 1981), and only a few species are known from Nearctic (Horstmann
2001), Afrotropical (Khalaim 2013), and probably Oriental (Khalaim 2011) regions.
In the East Palaearctic region, eight species of subgenus Pectinolochus were recorded
from Mongolia, Russian Siberia, and the Far East (Khalaim 2007), three species were
recorded from the Palaearctic part of China (Khalaim and Sheng 2009), one species
was described from South Korea (Khalaim 2011), and nine species (including seven
new species) were recorded from the Russian Far East and Japan (Khalaim 2012). The
most abundant species of the genus, 7. (G.) caudatus Holmgren, is widely distributed
within the Palaearctic region (Khalaim 2007) but has not been recorded from South
Korea till now.

Only one species of the genus Tersilochus, T. (T.) granulatus Khalaim, was known
from South Korea hitherto. The aim of this work is to describe eight new species and
provide a key for identification of ten Korean species of the genus Tersilochus.

Materials and methods

The ichneumonid collection of Yeungnam University, Gyeongsan, South Korea (fur-
ther YUG), was studied. From this material, nine species of the genus Tersilochus were
recognized (eight of them are new to science), and one recently described species,
T. granulatus, deposited in the Zoological Institute of the Russian Academy of Sciences,
St. Petersburg, Russia (further ZISP), was re-examined and photographed. All new
species are described from females. Unfortunately, we were unable to identify six males.

Most specimens, including all holotypes, are kept at Yeungnam University, and
some specimens are deposited in ZISP.

Photographs were taken at ZISP using a DFC290 digital camera attached to a
Leica MZ16 stereomicroscope. Partially focused photographs were combined using
Helicon Focus software. In the Material examined section, we provide abbreviations

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae)... 29

for Korean provinces in addition to the complete names, as abbreviations are widely
used in our previous papers on Korean Tersilochinae. Morphological terminology pre-
dominantly follows Townes (1969, 1971) with changes according to Khalaim (2011).
Additional characters in the key are given in square brackets.

Taxonomy

Tersilochus Holmgren, 1859
http://species-id.net/wiki/Tersilochus

Type species. Thersilochus cognatus Holmgren, 1860 (= jocator Holmgren, 1859) (Hor-
stmann 2005: 1269-1270).

All Korean species have occipital carina complete, scutellum with lateral longi-
tudinal carinae developed only at its basal part, fore wing with second recurrent vein
distinctly postfurcal and legs slender with tarsal claws not pectinate.

Key to species of Tersilochus occurring in South Korea

1 Second tergite 2.0—2.5 times as long as anteriorly broad. Thyridial depression
distinctly elongate. First tergite very slender, about 5.0 times as long as pos-
teriorly broad, smooth, with small glymma situated in apical 0.6—0.7 of first
tergite. [Malar space about as long as basal width of mandible. Ovipositor
with weak dorsal subapical depression, without teeth, its sheath about twice
as long as first tergite.] (Subgenus Gonolochus Forster) .............. T. caudatus

— Second tergite 0.8—-1.5 times as long as anteriorly broad (Figs 13, 17, 27,
30, 40, 49, 60, 70). Thyridial depression short, distinctly transverse or as
long as broad (Figs 13, 17, 27, 30, 40, 49, 60, 70) (except 7. fidicinus sp.
n. with thyridial depression 1.5 times as long as broad). First tergite shorter,
2.5—3.0 times as long as posteriorly broad (Figs 27, 30, 40, 60, 70) (except
T. granulatus with first tergite 4.5 times as long as broad, Fig. 17), usually
striate laterally, with glymma often deep and large, and usually situated at or
slightly behind center of first tergite. (Subgenus Tersilochus s. stv.) 0... 2

2: Mesopleuron centrally distinctly punctate, smooth between punctures (Fig. 46).
Fore wing with metacarpus almost reaching apex of fore wing. Finger-shaped
subapical structures present on outer surface of flagellomeres 2 to 6 (Fig. 44).
Flagellum with 26 segments (Fig. 43). Ovipositor very short, its sheath about
0.6 times as long as first tergite (Figs 48, 50)... eee T. punctator sp. n.

— Mesopleuron densely granulate, impunctate or with fine punctures (Figs 2,
9, 24, 29, 56, 66). Fore wing with metacarpus not reaching apex of fore
wing (Figs 11, 25, 35, 58, 69). Finger-shaped subapical structures absent on
flagellomere 2, present on flagellomeres 3(4) to 6(7) (Figs 8, 21, 34, 55, 65).
Flagellum with 17—21 segments (Figs 1, 7, 20, 28, 31, 54, 64). Ovipositor

30

Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

longer, sometimes very long, its sheath 0.7—3.0 times as long as first tergite
Gas Feasts ml [Aina Etat 710 Rts] op iy (ote SN ORRR Boot Rr ARe repent eon UT ae 3
Head, in dorsal view, weakly to moderately rounded and very strongly ta-
pered behind eyes (Figs 16, 53). Clypeus flat (Fig. 52). Small species with
body length 3.2—4.0 mm and fore wing length 2.4—2.8 mm... eee 4
Head, in dorsal view, strongly rounded, weakly tapered just behind eyes
(Figs 6, 19, 33, 63). Clypeus conspicuously bent backwards in lower 0.3—0.4
(with transverse bend, as in European T: jocator Holmgren; except T. obsti-
natus sp. n., which has clypeus strongly truncate, probably abnormal). Body
length 3.7—-5.1 mm and fore wing length 2.8—3.9 mm... eeeeeeeeeeeeees 5
Propodeum with basal keel (Fig. 17); all carinae weak (sometimes partly in-
distinct), without adjacent wrinkles. First tergite brown, entirely smooth,
very slender, about 4.5 times as long as broad posteriorly (Figs 15, 17). Sec-
ond tergite elongate, about 1.5 times as long as broad anteriorly (Fig. 17).
Ovipositor without dorsal subapical teeth, its sheath about 0.75 times as long
ASIST LOLOL So oscut Ohana ureter lesa ee eMe oaceiialcnsta T. granulatus Khalaim
Propodeum with basal area (Fig. 57); all carinae strong, transverse carina with
short adjacent wrinkles (Fig. 57). First tergite black, less slender, 3.0 times as
long as broad posteriorly, with petiole distinctly striate laterally and dorsally
(Fig. 60). Second tergite transverse, 0.8 times as long as broad anteriorly (Fig.
60). Ovipositor with two dorsal subapical teeth (Fig. 61), its sheath 1.25
tiimesvasdono-asrsrtergite (Pig. 659) hc cucespetee setetasdurvenr sailed T. serratus sp. n.
Eyes conspicuously enlarged; temple short, almost 0.6 times as long as eye
width (Fig. 33). [Flagellum brown (Fig. 31). Metasoma behind first tergite
brownish yellow (Fig. 36). Ovipositor short, with dorsal subapical notch, its

sheath as long as first tergite (Figs 36, 37).]...... eee T. obstinatus sp. n.
Eyes not enlarged; temple longer, 0.75—0.85 times as long as eye width (Figs
Ga ES ea s9 sp da A en me a ln ge eR eh tide Sr ll ln = tee 6

Eyes with inner orbits weakly but distinctly convergent dorsally (Fig. 5). Ovi-
positor short, apically clavate, its sheath slightly shorter than first tergite (Fig.
WD) God ons Ain Shoat iaeeetsabdadeyahessiteutetiiaesh ti viiueas Gonads vsendelaen T. gangwonus sp. n.
Eyes with inner orbits more or less parallel (Figs 23, 62). Ovipositor apically not
clavate, its sheath sometimes much longer than first tergite (Figs 3, 26, 68) ....7
Malar space short, 0.4—0.6 times as long as basal width of mandible........... 8
Malar space almost as long as basal width of mandible... eee 9
Metasoma behind first tergite yellow-brown (Figs 18, 26). Thyridial depres-
sion strongly transverse (Fig. 27). Ovipositor short, apically thin and without
distinct dorsal notch, its sheath 0.7 times as long as first tergite (Fig. 26)......
ee ee ee ee, ee eee re eee, ee eee T. tracundus sp. n.
Metasoma behind first tergite predominantly dark brown (Fig. 3). Thy-
ridial depression 1.5 times as long as broad. Ovipositor longer, with sharp
dorsal subapical notch (Fig. 4), its sheath 1.7—1.8 times as long as first
Sa gS Tet et 8 Aen eh Ooch Ser Se ea T. fidicinus sp. n.

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae).... 31

9 Propodeal spiracle separated from pleural carina by 2.0—2.5 times diameter
of spiracle (Fig. 29). Flagellum with finger-shaped subapical structures on
outer surface of flagellomeres 4 to 7. Ovipositor short and robust, evenly
upcurved, with sharp dorsal subapical notch, its sheath 1.25 times as long as
VOR B12) g 4 REEVE MR tae ae Me dente SA heart Re Ne a re, T. nigellus sp. n.

= Propodeal spiracle adjacent to pleural carina (Fig. 66). Flagellum with finger-
shaped subapical structures on outer surface of flagellomeres 3 to 6 (Fig. 65).
Ovipositor much longer, apically thin and strongly upcurved, its sheath al-
most 3.0 times as long as first tergite (Fig. 68) .......... T. uncinatus sp. n.

Tersilochus (Gonolochus) caudatus (Holmgren, 1860)
http://species-id.net/wiki/Tersilochus_caudatus

Material examined. South Korea, Gangwon-do (GW), Taebaek-si, Tong-dong, Yeon-
hwasan, 37°09'00.89"N, 129°00'10.41"E, 14.V.1997, 1 female.

Distribution. Widespread transpalaearctic species. First record from South Korea.

Tersilochus (Tersilochus) fidicinus Khalaim & Lee, sp. n.
http://zoobank.org/CD65 18A9-E696-4130-93EE-CDF1AD227329
http://species-id.net/wiki/Tersilochus_fidicinus

Figs 1-4

Description. Female (holotype). Body length 4.8 mm. Fore wing length about 3.9
mm (apices of both wings absent).

Head roundly constricted behind eyes in dorsal view (as in Fig. 6); temple 0.84
times as long as eye width. Inner eye orbits parallel. Mandible with upper tooth much
longer than lower tooth. Clypeus lenticular, 3.0 times as broad as long, in profile con-
vex, with lower 0.3 bent backwards; sparsely punctate, very finely granulate and dull
in upper 0.7. Malar space 0.5—0.6 times as long as basal width of mandible. Flagel-
lum of antenna filiform, with 19 segments in holotype and 17 in paratype (Fig. 1);
subbasal flagellomeres about 1.4 times and subapical flagellomeres about 1.2 times as
long as broad; flagellomeres 4 to 6 with distinct subapical finger-shaped structures on
outer surface. Face, frons, vertex, and temple distinctly granulate, dull, and impunc-
tate. Mesosoma almost entirely densely granulate; lateral lobes of mesoscutum with
fine punctures, and upper posterior corner of mesopleuron finely punctate on almost
smooth and shining background. Notaulus very weak, with indistinct wrinkles. Fove-
ate groove very weak, narrow, and short, situated in center of mesopleuron (Fig. 2).
Propodeum mediodorsally with fine longitudinal wrinkles; basal part 0.43 times as
long as apical area. Propodeal spiracle separated from pleural carina by 1.5—2.0 times
diameter of spiracle (Fig. 2). Apical area almost flat, anteriorly widely rounded. Apical
longitudinal carinae weak but complete. Fore wing with intercubitus rather long, equal

32 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

Figures 1-8. Tersilochus fidicinus sp. n., female, holotype: | head with antenna, lateral view 2 head and

mesosoma, lateral view 3 metasoma with ovipositor, lateral view 4 apex of ovipositor, lateral view. Tersilo-
chus gangwonus sp. n., female, holotype (Figs 5, 6) and paratype (Figs 7, 8): 5 head, frontal view 6 head,

dorsal view 7 antenna, lateral view 8 base of antenna, lateral view.

by length to abscissa of cubitus between intercubitus and second recurrent vein. First
abscissa of radius distinctly longer than width of pterostigma. Metacarpus ending far
from apex of fore wing. Postnervulus intercepted somewhat below middle. Hind wing
with nervellus slightly reclivous or vertical. Metasoma: first tergite 2.8 times as long
as broad posteriorly, mostly smooth; petiole trapeziform in cross-section, very finely
striate laterally. Glymma deep, situated slightly behind center of first tergite, joining
by distinct furrow to ventral part of postpetiole. Second tergite as long as anteriorly
broad. Thyridial depression deep, about 1.5 times as long as broad. Ovipositor evenly
upcurved, with deep and sharp dorsal subapical notch (Figs 3, 4); sheath 1.8 times as
long as first tergite.

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae).... 33

Head (including clypeus), mesosoma, and first tergite black; palpi brownish yel-
low to brown; tegula yellow. Mandible blackish in basal 0.4, reddish brown centrally
and with teeth reddish black. Antenna entirely black. Pterostigma brown with whitish
marks on proximal and distal corners. Legs brownish yellow; coxae brownish black;
first trochanters brownish. Metasoma behind first tergite predominantly dark brown.

Male. Unknown.

Comparison. Differs from other species of the genus by the combination of long
temple, granulate and impunctate head, and mesosoma (Figs 1, 2), weak foveate groove
of mesopleuron (Fig. 2), elongate thyridial depression, and long ovipositor with sharp
dorsal subapical notch (Figs 3, 4).

Variation. Paratype almost exactly corresponds with the holotype. In paratype,
flagellomeres are slightly shorter, propodeum is with weak basal keel, and ovipositor is
slightly shorter than in the holotype.

Type material. Holotype female, South Korea, Gangwon-do (GW), Taebaek-si,
Hyeoldong, Mt. Taebaek, 37°05'N, 128°54'E, 14.V.1992, coll. J.W. Lee (YUG).

Paratype. 1 female (ZISP), South Korea, Gyeongbuk-do (GB), Uljin-gun, Seo-
myeon, Wangpi-ri, Wangpicheon, Parkdaljae, Malaise trap, 24.VI-31.VII.2012, coll.
J.K. Choi.

Distribution. South Korea.

Etymology. Named after the Latin fidicinus (of lute playing).

Tersilochus (Tersilochus) gangwonus Khalaim & Lee, sp. n.
http://zoobank.org/FDFC6D32-1939-473 1-BCD6-7FECE1D2FCOB
http://species-id.net/wiki/Tersilochus_gangwonus

Figs 5-14

Description. Female (holotype). Body length 4.2 mm. Fore wing length 3.35 mm.
Head strongly rounded behind eyes in dorsal view (Fig. 6); temple 0.75 times as
long as eye width. Inner eye orbits weakly but distinctly convergent dorsally (Fig. 5).
Mandible with upper tooth longer than lower tooth. Clypeus lenticular, 2.5 times as
broad as long, in profile convex, with lower 0.4 bent backwards (Fig. 5); sparsely punc-
tate, finely granulate, and dull in upper 0.7. Malar space about as long as basal width
of mandible. Flagellum of antenna filiform, with 19 segments (Fig. 7); subbasal flagel-
lomeres 1.4—1.5 times as long as broad, subapical flagellomeres slightly elongate; flagel-
lomeres 4 to 6 with distinct subapical finger-shaped structures on outer surface (Fig. 8,
arrows). Face, frons, vertex, and temple distinctly granulate, dull, and impunctate (Figs
5, 6). Mesosoma entirely densely granulate, dull, and impunctate (Fig. 9); mesopleu-
ron centrally with fine oblique or horizontal striae on granulate background. Notaulus
absent. Foveate groove weak, narrow, and short. Propodeum mediodorsally with fine
longitudinal wrinkles (Fig. 10); basal part 0.35 times as long as apical area. Propodeal
spiracle separated from pleural carina by 0.7—1.0 times diameter of spiracle. Apical area
flat, anteriorly widely rounded (Fig. 10). Apical longitudinal carinae anteriorly weak.

34 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

LS 5 . - P

Figures 9-14. Tersilochus gangwonus sp. n., female, holotype: 9 head, mesosoma and first tergite, lateral
view 10 mesoscutum and propodeum, dorsolateral view I 1 fore wing 12 metasoma with ovipositor,

lateral view 13 postpetiole and second tergite, dorsal view 14 ovipositor, lateral view.

Fore wing (Fig. 11) with intercubitus thickened, about as long as abscissa of cubitus
between intercubitus and second recurrent vein. First abscissa of radius distinctly longer
than width of pterostigma. Metacarpus ending far from apex of fore wing. Postnervulus
intercepted below middle. Hind wing with nervellus vertical. Metasoma: first tergite 2.7
times as long as broad posteriorly, mostly smooth; petiole trapeziform in cross-section,
well separated from postpetiole in dorsal view, finely striate laterally before glymma.
Glymma deep, situated somewhat behind center of first tergite, joining by distinct fur-
row to ventral part of postpetiole (Figs 9, 12). Second tergite as long as anteriorly broad
(Fig. 13). Thyridial depression short, as long as broad in the holotype (Fig. 13) and
transverse in the paratype. Ovipositor short and robust, weakly upcurved, clavate, with
rather sharp dorsal subapical notch (Fig. 14); sheath 0.85 times as long as first tergite.
Head, mesosoma, and first tergite black; palpi and lower 0.4 of clypeus brown;
mandible yellow-brown, fuscous basally, and with reddish teeth; tegula yellow. An-

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae).... 35

tenna entirely black. Pterostigma brown. Legs brownish yellow; coxae brownish black,
first trochanters brownish. Metasoma behind first tergite dark brown.

Male. Unknown.

Comparison. Differs from other Korean species of the genus Tersilochus by the
combination of inner eye orbits convergent dorsally (Fig. 5), and short and clavate
ovipositor apically with rather sharp dorsal subapical depression (Figs 12, 14).

Variation. Paratype corresponds well with the holotype but has somewhat less
clavate ovipositor and shorter thyridial depression.

Type material. Holotype female, South Korea, Gangwon-do (GW), Taebaek-si,
Sodo-dong Mt. Taebaek, Danggol valley, 37°05'N, 128°56'E, 5.V.1999, coll. J.W.
Lee (YUG).

Paratype. 1 female (ZISP), South Korea, Gangwon-do (GW), Taebaek-si, Hyeol-
dong, Mandeoksa, 37°07'06"N, 128°56'52"E, 6.V.1999, coll. J.W. Lee.

Distribution. South Korea.

Etymology. Named after the type locality, Gangwon province of South Korea.

Tersilochus (Tersilochus) granulatus Khalaim, 2011
http://species-id.net/wiki/Tersilochus_granulatus
Figs 15-17

Comparison. Differs from other Korean species of the genus by an evenly granulate
propodeum with basal keel (Fig. 17), very slender brown first tergite (Figs 15, 17), and
distinctly elongate second tergite (Fig. 17).

Remarks. Flagellum with finger-shaped subapical structures present on outer sur-
face of flagellomeres 4 to 6; these structures in this species are very small, inconspicu-
ous, and hardly visible under a light microscope.

Distribution. South Korea: Gyeongsangnam-do (GN).

Tersilochus (Tersilochus) iracundus Khalaim & Lee, sp. n.
http://zoobank.org/83AB92C8-1729-4ADA-9F 1 5-286F4861 DAE5
http://species-id.net/wiki/Tersilochus_iracundus

Figs 18-27

Description. Female (holotype). Body length 3.7 mm. Fore wing length 2.8 mm.
Head strongly rounded behind eyes in dorsal view (Fig. 19); temple 0.74 times
as long as eye width. Inner eye orbits parallel (Fig. 23). Mandible with upper tooth
much longer than lower tooth. Clypeus lenticular, almost 3.0 times as broad as long,
in profile convex, with lower 0.4 bent backwards (Fig. 23); sparsely punctate, finely
granulate, and dull in upper 0.7. Malar space 0.4 times as long as basal width of
mandible. Flagellum of antenna weakly tapered towards apex, with 19 segments (Fig.
20); subbasal flagellomeres 1.3—1.4 times, and subapical flagellomeres about 1.2 times

36 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

Figures 15-22. Tersilochus granulatus Khalaim, female, holotype (Figs 15, 16) and paratype (Fig. 17):
15 habitus (without apices of wings and ovipositor), lateral view 16 head and anterior part of mesoscu-
tum, dorsal view |7 propodeum and base of metasoma, dorsal view. Tersilochus iracundus sp. n., female,
holotype: 18 habitus (without wings), lateral view 19 head and anterior part of mesoscutum, dorsal view

20 antenna, lateral view 21 base of antenna, lateral view 22 propodeum and hind coxae, dorsal view.

as long as broad; flagellomeres 4—6 with distinct and flagellomere 7 with rudimental
subapical finger-shaped structures on outer surface (Fig. 21). Face, frons, vertex, and
temple distinctly granulate, dull, and impunctate (Figs 19, 23).

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae).... 37

Mesosoma entirely granulate, dull, impunctate; mesopleuron centrally with fine
oblique striae on granulate background (Fig. 24). Notaulus absent. Foveate groove
weak and short, oblique, situated in anterior half of mesopleuron (Fig. 24). Propodeum
with narrow basal area, which is 0.4 times as long as apical area (Fig. 22). Propodeal
spiracle separated from pleural carina by 1.5 times diameter of spiracle. Apical area
slightly impressed, anteriorly rounded (Fig. 22). Apical longitudinal carinae developed
in posterior half, anteriorly absent. Fore wing (Fig. 25) with intercubitus thickened, as
long as abscissa of cubitus between intercubitus and second recurrent vein. First abscissa
of radius slightly longer than width of pterostigma. Metacarpus ending far from apex of
fore wing. Postnervulus intercepted below middle. Hind wing with nervellus vertical.
First tergite almost 3.0 times as long as broad posteriorly, mostly smooth, with petiole
more or less round in cross-section, well separated from postpetiole in dorsal view, fine-
ly striate laterally before glymma (Fig. 27). Glymma deep, situated somewhat behind
center of first tergite, joining by distinct furrow to ventral part of postpetiole (Fig. 26).
Second tergite as long as anteriorly broad (Fig. 27). Thyridial depression short, trans-
verse. Ovipositor short, slender, almost straight basally and upcurved in apical 0.3, with
fine teeth dorsally and ventrally at apex (Fig. 26); sheath 0.7 times as long as first tergite.

Head, mesosoma, and first tergite black; palpi, mandible (except reddish black
teeth), and lower 0.3 of clypeus yellow-brown; tegula yellow. Antenna dark brown.
Pterostigma brown. Legs brownish yellow; fore and mid coxae weakly brown, and
hind coxa strongly brown. Metasoma behind first tergite yellow-brown.

Male. Unknown.

Comparison. Differs from other Palaearctic species of Tersilochus by the combina-
tion short malar space, reddish brown behind first tergite of metasoma (Figs 26, 27)
and short ovipositor (Fig. 26).

Type material. Holotype female, South Korea, Chungbuk-do (CB), Jecheon-si,
Deoksan-myeon, Worak-ri, Deoksanmaepyoso, 36°52'N, 128°13'E, Malaise trap,
6—20.V.2006, coll. J.W. Lee (YUG).

Distribution. South Korea.

Etymology. Named after the Latin iracundus (angry, hot-tempered, furious).

Tersilochus (Tersilochus) nigellus Khalaim & Lee, sp. n.
http://zoobank.org/3A477F29-AB5 D-4141-A92E-C7A2ED9EAF41
http://species-id.net/wiki/Tersilochus_nigellus

Figs 28-30

Description. Female (holotype). Body length 5.1 mm. Fore wing length 3.8 mm.
Head strongly rounded behind eyes in dorsal view; temple 0.85 times as long as eye
width. Inner eye orbits parallel. Mandible with upper tooth distinctly longer than lower
tooth. Clypeus lenticular, 2.7 times as broad as long, in profile slightly convex, with lower
0.3 bent backwards; sparsely punctate, finely granulate, and dull in upper half. Malar space
almost as long as basal width of mandible. Flagellum of antenna weakly tapered towards

38 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

Figures 23-30. Tersilochus iracundus sp. n., female, holotype: 23 head, frontal view 24 mesosoma,

ventrolateral view 25 fore wings 26 metasoma with ovipositor, lateral view 27 tergites 1-3 of metasoma,
dorsal view. Tersilochus nigellus sp. n., female, holotype: 28 head with antenna and anterior part of meso-

soma, lateral view 29 mesosoma, lateral view 30 propodeum and base of metasoma, dorsolateral view.

apex, with 21 segments in the holotype and 20 segments in the paratype (Fig. 28); subbasal
flagellomeres 1.3—1.5 times and subapical flagellomeres 1.2—1.3 times as long as broad;
flagellomeres 4 to 7 with subapical finger-shaped structures on outer surface. Face, frons,
vertex, and temple distinctly granulate and dull; face and frons of holotype also with indis-

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae)... 39

tinct punctures. Mesosoma entirely granulate, dull, and mostly impunctate; mesopleuron
finely and rather densely punctate on finely granulate background (Fig. 29). Notaulus as
very weak wrinkle or tubercle. Foveate groove weak and short, situated in anterior half
of mesopleuron. Propodeum with basal keel, which is 0.31 times as long as apical area
(Fig. 30). Propodeal spiracle separated from pleural carina by 2.0-2.5 times diameter of
spiracle (Fig. 29). Apical area flat, anteriorly slightly pointed (Fig. 30). Apical longitudinal
carinae anteriorly weak. Fore wing with intercubitus longer than abscissa of cubitus be-
tween intercubitus and second recurrent vein. First abscissa of radius distinctly longer than
width of pterostigma. Metacarpus not reaching apex of fore wing. Postnervulus intercepted
below middle. Hind wing with nervellus vertical or slightly reclivous. Metasoma: first ter-
gite 2.6 times as long as broad posteriorly, mostly smooth, with petiole slightly depressed,
oval in cross-section, well separated from postpetiole in dorsal view, finely striate laterally
before glymma. Glymma deep, situated in apical 0.6 of first tergite, joining by distinct fur-
row to ventral part of postpetiole. Second tergite as long as anteriorly broad (Fig. 30). Thy-
ridial depression short, transverse (Fig. 30). Ovipositor evenly upcurved, thickened near
apex, with deep and sharp dorsal subapical notch; sheath 1.25 times as long as first tergite.

Head, mesosoma, and first tergite black; palpi and lower 0.3 of clypeus reddish
brown; mandible reddish brown with blackish base and teeth; tegula yellow. Anten-
na with scape and pedicel brownish black and flagellum entirely black. Pterostigma
brown. Legs brownish yellow; fore coxa brown basally; mid and hind coxae brown-
ish black; first trochanter of hind leg dark brown. Metasoma behind first tergite dark
brown ventrally to brownish black dorsally.

Male. Unknown.

Comparison. Similar to T. fidicinus sp. n. but differs by the longer malar space,
finely punctate mesopleuron (Fig. 29), propodeum with distinct basal keel (Fig. 30),
and shorter thyridial depression (Fig. 30).

Variation. Paratype almost exactly corresponds with the holotype with no ob-
vious variation.

Type material. Holotype female, South Korea, Jeonnam-do (JN), Jeongeup-si,
Jangseong-gun, Bukha-myeon, Namchanggol, Malaise trap, Site 18, 19.V.2005, coll.
D.K. Jung (YUG).

Paratype. 1 female (ZISP), South Korea, Gyeongbuk-do (GB), Cheongdo-gun,
Maejeon-myeon, 35°40'N, 128°50'E, 17.IV.1992, coll. J.W. Lee.

Etymology. Named after the Latin nigellus (somewhat black), on account of its
almost entirely black body.

Tersilochus (Tersilochus) obstinatus Khalaim & Lee, sp. n.
http://zoobank.org/CCB8684F-8 DD3-48AB-99E2-57 DFABEBOABG
http://species-id.net/wiki/Tersilochus_obstinatus

Figs 31-40

Description. Female (holotype). Body length 4.5 mm. Fore wing length 3.35 mm.

40 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

Figures 31-37. Tersilochus obstinatus sp. n., female, holotype: 31 head with antennae and mesosoma,

anterolateral view 32 head, frontal view 33 head, dorsal view 34 base of antenna, lateral view 35 fore

wing 36 metasoma with ovipositor, lateral view 37 apex of metasoma with ovipositor, lateral view.

Head very strongly rounded behind eyes in dorsal view (Fig. 33); temple short,
almost 0.6 times as long as eye width. Inner eye orbits weakly but distinctly con-
vergent dorsally (Fig. 32). Mandible with upper tooth distinctly longer than lower
tooth. Clypeus probably abnormal, with lower margin abruptly bent backwards (Fig.
32); distinctly and sparsely punctate on finely granulate and dull background. Malar
space 0.85 times as long as basal width of mandible. Flagellum of antenna filiform,
with 18 segments (Fig. 31); subbasal flagellomeres about 1.5 times as long as broad,

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae).... 41

subapical flagellomeres slightly elongate; flagellomeres 3 to 7 with distinct subapical
finger-shaped structures on outer surface (Fig. 34). Face, frons, vertex, and temple
distinctly granulate, dull, and impunctate. Mesosoma entirely granulate, dull, and
mostly impunctate; mesoscutum laterally with indistinct punctures. Notaulus absent.
Foveate groove situated in anterior half of mesopleuron, not reaching prepectal carina
anteriorly, almost straight, narrow, slightly oblique, with transverse wrinkles ventrally
(Fig. 31). Propodeum with basal keel (and few fine subparallel wrinkles), which is 0.37
times as long as apical area (Fig. 38). Propodeal spiracle separated from pleural carina
by 1.75 times diameter of spiracle. Apical area flat, anteriorly widely rounded (Fig. 38).
Apical longitudinal carinae distinct only posteriorly, anteriorly absent. Fore wing (Fig.
35) with intercubitus thick, shorter than abscissa of cubitus between intercubitus and
second recurrent vein. First abscissa of radius almost as long as width of pterostigma.
Metacarpus ending far from apex of fore wing. Postnervulus intercepted somewhat
below middle. Hind wing with nervellus vertical. Metasoma: first tergite 2.5 times
as long as broad posteriorly (Fig. 40), with petiole trapeziform in cross-section, well
separated from postpetiole in dorsal view, mostly smooth dorsally and laterally, finely
striate laterally before glymma, and with postpetiole striate dorsally. Glymma deep,
situated at center of first tergite, joining by distinct furrow to ventral part of postpeti-
ole (Fig. 39). Second tergite as long as anteriorly broad (Fig. 40). Thyridial depression
short, transverse (Fig. 40). Ovipositor short, weakly upcurved, with moderately deep
and sharp dorsal subapical notch (Fig. 37); sheath about as long as first tergite (Fig. 36).

Head, mesosoma, and first tergite black; palpi and lower margin of clypeus yel-
lowish brown; mandible yellowish brown, blackish basally and with black teeth; tegula
yellow. Antenna brown. Pterostigma brown. Legs brownish yellow, hind coxa brown-
ish. Metasoma behind first tergite brownish yellow (Fig. 36), tergites 3 to 5 dorsally
with brown anterior marks.

Male. Unknown.

Comparison. Differs from other Palaearctic species of Tersilochus by the combi-
nation of conspicuously enlarged eyes (temple short) (Figs 32, 33), short ovipositor
(Fig. 36) and light brownish yellow metasoma behind first tergite (Fig. 36).

Type material. Holotype female, South Korea, Chungnam-do, (CN), Daejeon,
Dong-gu, Daejeon University, 35°31'17"N, 126°50'12"E, Malaise trap, 13-28.
IV.2006 (YUG).

Distribution. South Korea.

Etymology. Named after the Latin obstinatus (firm, resolved, resolute, obstinate).

Tersilochus (Tersilochus) punctator Khalaim & Lee, sp. n.
http://zoobank.org/PDF24F38-F7 15-40F4-928D-6F4203C2C3C6
http://species-id.net/wiki/Tersilochus_punctator

Figs 41-51

Description. Female (holotype). Body length 5.2 mm. Fore wing length 4.4 mm.

42 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

Figures 38-44. Tersilochus obstinatus sp. n., female, holotype: 38 propodeum, dorsal view 39 base of
metasoma, lateral view 40 base of metasoma, lateral view. Tersilochus punctator sp. n., female, holotype:
41 head and anterior part of mesosoma, dorsal view 42 head, frontal view 43 antenna, lateral view

44 base of antenna, lateral view.

Head rounded behind eyes in dorsal view (Fig. 41); temple 0.72 times as long as
eye width. Inner eye orbits more or less parallel (Fig. 42). Mandible with upper tooth
somewhat longer than lower tooth. Clypeus lenticular with lower margin slightly
truncate, 2.9 times as broad as long, smooth, and sparsely punctate in upper 0.6, in
profile weakly convex (Fig. 42). Malar space 0.8 times as long as basal width of man-
dible. Flagellum of antenna distinctly tapered towards apex, with 26 segments (Fig.
43); subbasal flagellomeres 1.5—1.6 times and subapical flagellomeres 1.2—1.3 times
as long as broad; flagellomeres 2 to 6 with small subapical finger-shaped structures on

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae).... 43

outer surface (Fig. 44, arrows). Face, frons, and vertex densely punctate on granulate
surface and dull (Figs 41, 42). Temple moderately densely punctate, almost smooth,
and weakly shining between punctures. Notaulus with irregular wrinkles. Mesoscu-
tum granulate, finely and densely punctate. Foveate groove about 0.8 times as long
as mesopleuron, weakly curved, narrow, with fine transverse wrinkles, not reaching
prepectal carina anteriorly (Fig. 46). Mesopleuron distinctly punctate, granulate, and
dull below foveate groove, and mostly smooth and shining between punctures above
foveate groove (Fig. 46). Propodeum mediodorsally with strong median and two
weaker lateral wrinkles, basal part 0.38 times as long as apical area (Fig. 47). Dorsolat-
eral area of propodeum finely granulate, finely and sparsely punctate. Propodeal spir-
acle separated from pleural carina by almost 2.0 times diameter of spiracle (Fig. 45).
Apical area flat, anteriorly rounded (Fig. 47). Apical longitudinal carinae distinct
posteriorly and indistinct anteriorly. Fore wing with intercubitus thickened, some-
what longer than abscissa of cubitus between intercubitus and second recurrent vein.
First abscissa of radius longer than width of pterostigma. Metacarpus almost reaching
apex of fore wing. Postnervulus intercepted below middle. Hind wing with nervellus
vertical. Metasoma: first tergite 2.5 times as long as broad posteriorly, mostly smooth,
with petiole trapeziform in cross-section and well separated from postpetiole in dorsal
view. Glymma small, situated in apical 0.6 of first tergite, joining by distinct furrow
to ventral part of postpetiole (Figs 45, 48). Second tergite distinctly transverse, 0.8
times as long as anteriorly broad (Fig. 49). Thyridial depression as long as broad
(Fig. 49). Ovipositor very short, weakly upcurved, thickened near apex, with dorsal
subapical depression and small notch before this depression (Fig. 50, arrow); sheath
0.6 times as long as first tergite.

Head, mesosoma, and first tergite black; palpi, mandible (teeth reddish black),
lower 0.3 of clypeus, and tegula brownish yellow. Antenna with scape and pedi-
cel yellow-brown, flagellum black. Pterostigma dark brown. Legs brownish yellow;
fore and mid coxae basally brown; hind coxae brownish black; hind femur centrally
with brownish black mark on outer side. Metasoma behind first tergite predomi-
nantly yellow-brown ventrally and laterally, tergites 2 and 3 dorsally extensively
black with narrow yellow-brown band posteriorly, tergites 4 and 5 with dorsal
blackish areas smaller.

Male. Unknown.

Comparison. This is the only species of the genus Tersilochus in South Korea with
densely punctate mesopleuron (Fig. 46). It differs from other Palaearctic species of
Tersilochus by the combination of densely punctate and smooth mesopleuron between
punctures, well-developed foveate groove (Fig. 46), long metacarpus, and very short
ovipositor (Figs 48, 50). It is similar to the Russian Far East T° grandiculus Khalaim
but distinct in having less slender flagellum of antenna, less punctate head, and shorter
second tergite.

Remarks. One female from southeast China generally corresponds well with this
species (including small subapical finger-shaped structures on flagellomeres 2—5) but
has a flagellum with 20 segments, mesopleuron with weaker punctures and centrally

44 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

2°

ays

Figures 45-51. Tersilochus punctator sp. n., female, holotype (except Fig. 51): 45 mesosoma and first ter-
gite, lateral view 46 head and mesopleuron, anterolateral view 47 propodeum, dorsal view 48 metasoma,
lateral view 49 first tergite, dorsal view 50 apex of metasoma with ovipositor, lateral view 51 ovipositor,

lateral view (China).

mostly finely granulate, propodeal spiracle separated from pleural carina by half di-
ameter of spiracle, thyridial depression almost twice as long as broad, and ovipositor
strongly clavate, with conspicuous dorsal subapical depression and rounded tooth be-
fore this depression (Fig. 51). This specimen may belong to an undescribed species, so
study of an additional material is needed.

Type material. Holotype female, South Korea, Gyeongbuk-do (GB), Yeongju-si,
Punggi-eup, Jungnyeong, 35°53'42.7"N, 128°26'22.0"E, Malaise trap, Site-99, 3-12.
VI1.2009, coll. C.J. Kim (YUG).

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae).... 45

Additional material. China, Jiangxi reg., Jiulianshan, 27.1V.2011, coll. M.-L.
Sheng, 1 female (deposited in General Station of Forest Pest Management, State For-
estry Administration, P.R. China).

Distribution. South Korea, ?China (Jiangxi).

Etymology. Named on account of its densely punctate mesopleuron.

Tersilochus (Tersilochus) serratus Khalaim & Lee, sp. n.
http://zoobank.org/04B906EC-FEE8-450B-94E6-A38F9B4133BA
http://species-id.net/wiki/Tersilochus_serratus

Figs 52-61

Description. Female (holotype). Body length 4.0 mm. Fore wing length 2.8 mm.

Head weakly rounded and strongly narrowed behind eyes in dorsal view (Fig. 53);
temple 0.72 times as long as eye width. Inner eye orbits very weakly divergent dorsally
(Fig. 52). Mandible with upper tooth longer than lower tooth. Clypeus lenticular, 3.2
times as broad as long, in profile flat, finely granulate and indistinctly punctate in up-
per 0.7. Malar space as long as basal width of mandible. Flagellum of antenna filiform,
with 21 segments (Fig. 54); all flagellomeres 1.2—1.4 times as long as broad; flagello-
meres 4—6 with distinct subapical finger-shaped structures on outer surface (Fig. 55).
Face, frons, vertex, and temple distinctly granulate, dull, and impunctate (Figs 52, 53).
Mesosoma entirely granulate, dull, and impunctate; mesopleuron centrally with fine,
slightly oblique striae on granulate background (Fig. 56). Notaulus absent. Foveate
groove weak, with fine transvers wrinkles, oblique, situated in anterior 0.6 of meso-
pleuron (Fig. 56). Propodeum with rectangular basal area, which is about 1.5 times
as long as broad and 0.35 times as long as apical area (Fig. 57); transverse carina with
short adjacent wrinkles (Fig. 57). Propodeal spiracle adjacent to pleural carina. Api-
cal area flat, anteriorly truncate (Fig. 57), posteriorly with transverse wrinkles. Apical
longitudinal carinae well-developed, reaching transverse carina anteriorly. Fore wing
(Fig. 58) with intercubitus slightly longer than abscissa of cubitus between intercubi-
tus and second recurrent vein. First abscissa of radius somewhat longer than width of
pterostigma. Metacarpus ending far from apex of fore wing. Postnervulus intercepted
distinctly below middle. Hind wing with nervellus distinctly reclivous. Metasoma:
first tergite almost 3.0 times as long as broad posteriorly, with petiole trapeziform
in cross-section, entirely striate dorsally and laterally (Fig. 60), and with postpetiole
smooth (except base) and well separated from petiole in dorsal view. Glymma deep,
situated behind center of first tergite, joining by distinct furrow to ventral part of
postpetiole. Second tergite distinctly transverse, 0.8 times as long as anteriorly broad
(Fig. 60). Thyridial depression short, distinctly transverse (Fig. 60). Ovipositor slen-
der, upcurved, with two distinct subapical teeth dorsally and deep depression between
these teeth (Figs 59, 61); sheath 1.25 times as long as first tergite.

Head, mesosoma, and first tergite black; palpi, mandible (except reddish black
teeth), and lower 0.3 of clypeus yellow-brown; tegula yellow. Antenna dark brown.

46 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

Figures 52-61. Tersilochus serratus sp. n., female, holotype: 52 head, frontal view 53 head, dorsal view

54 antenna, frontal view 55 base of antenna, lateral view 56 mesopleuron, ventrolateral view 57 scutel-
lum and propodeum, dorsolateral view 58 fore wing 59 apex of metasoma with ovipositor, lateral view

60 first and second tergites, dorsal view 61 apex of ovipositor, lateral view.

Pterostigma brown with conspicuous white spots on its proximal and distal corners
(Fig. 58). Legs brownish yellow; fore and mid coxae weakly, and hind coxa strongly
darkened with brown. Metasoma behind first tergite yellow-brown ventrally and pre-

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae).... 47

dominantly dark brown to brownish black laterally and dorsally; tergites 2 and 3 with
narrow pale posterior band (Fig. 59).

Male. Unknown.

Comparison. Differs from other Korean species of the genus by the combination
of head weakly rounded and very strongly tapered behind eyes in dorsal view (Fig. 53),
flat clypeus (Fig. 52), strongly striate dorsally first metasomal tergite (Fig. 60), and
shape of the ovipositor (Fig. 61). This is the only Korean species of the genus Tersilo-
chus that possesses an ovipositor with two distinct dorsal subapical teeth (Fig. 61) and
thus belongs to the cognatus species group (correct name for the jocator species group
according to Horstmann 2005); 7. iracundus sp. n. and T. punctator sp. n. have ovi-
positors with rather weak and inconspicuous dorsal subapical teeth (Figs 26, 50, 51).

Type material. Holotype female, South Korea, Gyeongbuk-do (GB), Cheong-
do-gun, Gakbuk-myeon, Namsan-3ri, 35°41'N, 128°35'23.0"E, Malaise trap, 1-12.
IV.2009, coll. J.W. Lee (YUG).

Distribution. South Korea.

Etymology. Named after the Latin serratus (serrated, toothed like a saw), on ac-
count of its serrate ovipositor apex.

Tersilochus (Tersilochus) uncinatus Khalaim & Lee, sp. n.
http://zoobank.org/2AF565E7-C65 1-41 DE-9AB 1-AOBCF8A9A634
http://species-id.net/wiki/Tersilochus_uncinatus

Figs 62—70

Description. Female (holotype). Body length 3.9 mm. Fore wing length 3.05 mm.
Head roundly narrowed behind eyes in dorsal view (Fig. 63); temple almost 0.8
times as long as eye width. Inner eye orbits parallel (Fig. 62). Mandible with upper
tooth longer than lower tooth. Clypeus lenticular, 2.75 times as broad as long, with
lower 0.3 bent backwards (Fig. 62), in profile weakly convex, finely granulate and with
few indistinct punctures in upper 0.7. Malar space almost as long as basal width of
mandible. Flagellum of antenna filiform, with 17 segments (Fig. 64); subbasal flagel-
lomeres 1.4—1.5 times and subapical flagellomeres 1.2—1.3 times as long as broad; flag-
ellomeres 3—6 with distinct subapical finger-shaped structures on outer surface (Fig.
65, arrows). Face, frons, vertex, and temple distinctly granulate, dull, and impunctate
(Figs 62, 63). Mesosoma entirely granulate, dull, and impunctate; mesopleuron with-
out striae (Fig. 66). Notaulus absent (Fig. 63). Foveate groove absent (Fig. 66). Pro-
podeum with basal keel, which is 0.34 times as long as apical area (Fig. 67). Propodeal
spiracle small, separated from pleural carina by half diameter of spiracle (Fig. 66). Api-
cal area flat, anteriorly rounded (Fig. 67). Apical longitudinal carinae well-developed
posteriorly and weak anteriorly near transverse carina. Fore wing (Fig. 69) with inter-
cubitus moderately thickened, longer than abscissa of cubitus between intercubitus
and second recurrent vein. First abscissa of radius longer than width of pterostigma.
Metacarpus not reaching apex of fore wing. Postnervulus intercepted slightly below

48 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

Figures 62-68. Tersilochus uncinatus sp. n., female, holotype: 62 head, frontal view 63 head and mesoscu-

tum, dorsal view 64 head with antenna, dorso-postero-lateral view 65 base of antenna, lateral view 66 head

and mesosoma, lateral view 67 propodeum, dorsal view 68 apex of metasoma with ovipositor, lateral view.

middle. Hind wing with nervellus vertical. Metasoma: first tergite 2.7 times as long as
broad posteriorly (Fig. 70), mostly smooth, with petiole trapeziform in cross-section,
finely striate laterally before glymma, and postpetiole well separated from petiole in
dorsal view. Glymma deep, situated slightly behind center of first tergite, joining by
distinct furrow to ventral part of postpetiole. Second tergite as long as anteriorly broad
(Fig. 70). Thyridial depression short, distinctly transverse (Fig. 70). Ovipositor slen-

Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae)... 49

70

Figures 69-70. Tersilochus uncinatus sp. n., female, holotype: 69 fore wing 70 first and second tergites,
dorsal view.

der, weakly upcurved in basal 0.8, somewhat thickened subapically, with apex thin,
strongly upcurved, and with weak dorsal notch (Fig. 68, arrow); sheath about 3.0
times as long as first tergite.

Head (including clypeus), mesosoma, and first tergite black; palpi brown; man-
dible fuscous basally and with reddish black teeth; tegula yellow. Antenna entirely
black. Pterostigma brown with white spot on distal corner. Legs brown; hind leg with
coxa and base of first trochanter strongly darkened with brown. Metasoma behind first
tergite brownish black.

Male. Unknown.

Comparison. Differs from other Korean species of the genus Tersilochus by the
long ovipositor with apex thin and strongly upcurved (Fig. 68).

Type material. Holotype female, South Korea, Gyeongnam-do (GN), Sancheong-
gun, Samjang-myeon, Yu Pyeongni, Wangdeungjae, 16.VI—20.[X.2008 (YUG).

Distribution. South Korea.

Etymology. Named after the Latin uncinatus (hooked), on account of its apically
strongly upcurved ovipositor.

Discussion

All Korean species of Tersilochus are rare, being represented in our material by only
one or few specimens, whereas in the Russian Far East this genus is conspicuously

50 Andrey I. Khalaim et al. / Journal of Hymenoptera Research 36: 27-51 (2014)

much more abundant (Khalaim 2012, pers. data). Almost all specimens were col-
lected in Korea from April to early June, except the paratype of T. fidicinus sp. n.
(collected in June/July) and the holotype of 7. uncinatus sp. n. (collected between
June and September). Thus, the flight period of the genus in Korea is generally
restricted to spring and early summer.

Subapical finger-shaped structures on outer side of subbasal flagellomeres were
found and described for all Korean species of Tersilochus, and number and location of
these structures were used for species separation in the key. Finger-shaped structures
on flagellomeres of two European species of Phradis Forster were discovered for the
first time by Khalaim et al. (2009). Later, these structures were found in many other
tersilochine genera, e.g. in Neotropical species of Allophrys Forster, Barycnemis Forster
and Meggoleus Townes (Khalaim and Broad 2012), and East Palaearctic species of Ter-
silochus (Khalaim 2012). The finding of finger-shaped structures in Korean species of
Tersilochus indicates that these structures are widely distributed within the subfamily,
and we show that these structures may be used for diagnosing species.

Acknowledgements

We are thankful to Dr M.-L. Sheng for the loan of the additional specimen of 7. punc-
tator. This work was supported by the Russian Foundation for Basic Research (grant
no. 13-04-00026) and the National Institute of Biological Resources (NIBR), funded
by the Ministry of Environment (MOE) of the Republic of Korea (NIBR No. 2014-
02-001, 1834-302).

References

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Balueva EN, Khalaim AI, Kim K-B, Lee L-W (2013b) Taxonomic review of genus Diapar-
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