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JHR 76: 39-56 (2020) JOURNAL OF | *rvteve cverace oar
doi: 10.3897/jhr.76.50794 RESEARCH ARTICLE (MEE Hymenoptera

http://jhr.pensoft.net The Inerational Society of ymenoptersts. RESEARCH

The genus [ndabracon van Achterberg
(Hymenoptera, Braconidae, Braconinae)
in China, with description of four new species

Yang Li'*, Pu Tang'”, Xue-Xin Chen!?#4

| Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China 2 State Key Lab of Rice Biology,

Lhejiang University, Hangzhou 310058, China 3 Ministry of Agriculture Key Lab of Molecular Biology of
Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China 4 Zhejiang Provincial Key Labo-

ratory of Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China

Corresponding author: Xue-xin Chen (xxchen@zju.edu.cn)

Academic editor: J. Fernandez-Triana | Received 4 February 2020 | Accepted 25 March 2020 | Published 27 April 2020
http://zoobank. ore/BF46486F-0940-4DAF-91 44- 1078015 7BEAO

Citation: Li Y, Tang P Chen X-X (2020) The genus /ndabracon van Achterberg (Hymenoptera, Braconidae, Braconinae)
in China, with description of four new species. Journal of Hymenoptera Research 76: 39-56. https://doi.org/10.3897/
jhr.76.50794

Abstract

‘The species of the braconid genus /ndabracon van Achterberg, 1992 (Hymenoptera: Braconidae, Braconi-
nae) from China are revised and 6 species are recognized, including 4 new species (Indabracon albogilvus
sp. nov., /. discolor sp. nov., I. nigricans sp. nov. and I. semicircularis sp. nov.), which are described and
illustrated. A key to the Chinese species of the genus /ndabracon is provided.

Keywords

Hymenoptera, Braconidae, Braconinae, Braconini, Indabracon, new species, China

Introduction

Indabracon van Achterberg, 1992, is a small genus in the tribe Braconini Nees (Hyme-
noptera: Braconidae: Braconinae) with only three described species all occurring in the
Oriental region (Yu et al. 2016). The biology of this genus is still unknown.

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

40 Yang Li et. al. / Journal of Hymenoptera Research 76: 39-56 (2020)

During the course of the study of the Chinese Braconidae, six species of this genus
have been found in China, of which four species are new to science (/. albogilvus sp.
nov., /. discolor sp. nov., I. nigricans sp. nov. and I. semicircularis sp. nov.). In the present
paper, the new species are described and illustrated, and a key to the Chinese species
of Indabracon is provided.

Material and methods

For the recognition of the subfamily Braconinae and the tribe Braconini, see van
Achterberg (1990, 1993) and Chen & van Achterberg, (2019), for the terminology
and measurements used in this paper, see van Achterberg (1988, 1993), and for ad-
ditional references, see Yu et al. (2016). The following abbreviations are used: POL =
postocellar line; OOL = ocular-ocellar line; OD = minimum diameter of posterior
ocellus; Tl = first metasomal tergite; T2 = second metasomal tergite; T3 = third meta-
somal tergite; [4 = fourth metasomal tergite; [5 = fifth metasomal tergite; T6 = sixth
metasomal tergite; I77 = seventh metasomal tergite. The medial length of the third
metasomal tergite is measured from the posterior border of the second suture to the
posterior margin of the tergite.

Photographs were made with a Keyence VHX-2000 digital microscope and the
photos were slightly processed (mainly cropped and the background modified) in Pho-
toshop CS6. For the descriptions and measurements, a Leica M125 stereomicroscope
was used. The specimens are deposited in the Institute of Zoology, Chinese Academy

of Sciences, Beijing (IZCAS).

Results

Genus Indabracon van Achterberg, 1992
Figs 1-8

Indabracon van Achterberg, 1992: 384; Yang, Chen and Liu 2006: 319; Chen and
Yang, 2006: 122. Type species: Spinaria trimaculata Cameron, 1900.

Diagnosis. Body medium-sized, body length 6.0-10.0 mm; terminal flagellomere
often strongly acute apically; in lateral view scapus gradually narrowed basally, with-
out double margin at inner side apically and concave apico-laterally, ventrally weakly
to distinctly longer than dorsally; eye glabrous, not or weakly emarginated; face with
few rugae and rugulae or some punctures; clypeus moderately narrow, without dorsal
carina; malar suture absent or present, sometimes sculptured; labio-maxillary complex
normal, not elongate; frons nearly flat, with some setae and a strong median groove;
mesosoma largely smooth and shiny; notauli shallow, and only present anteriorly;
pleural sulcus smooth, absent medially; mesosternal sulcus smooth, shallow; antes-

The braconid genus \ndabracon van Achterberg in China 4]

cutal depression and metapleural flange narrow, sometimes protruding anteriorly;
scutellar sulcus moderately wide and crenulate; metanotum strongly convex medi-
ally, and with a short median carina anteriorly; propodeum largely smooth, with-
out medio-longitudinal carina or groove, sometimes with short crenulae posteriorly;
propodeal spiracle round, near middle of propodeum, and without tubercle above
it; angle between veins 1-SR and C+SC+R of fore wing about 50°; fore wing vein
1-SR+M slightly to strongly bent subbasally; fore wing vein cu-a interstitial or nar-
rowly postfurcal; fore wing vein 1-M straight; fore wing vein CU1b medium-sized to
long (slightly shorter than vein 3-CU1), slender and reclivous; fore wing vein m-cu
converging to vein 1-M posteriorly; fore wing vein 1-R1 much longer than pterostig-
ma, ending distad of apex of vein 3-M; vein 3-CU1 of fore wing slender; fore wing
vein r oblique and shorter than width of pterostigma; second submarginal cell of fore
wing long, and subparallel-sided; hind wing vein SC+R1 distinctly longer than vein
Ir-m; hind wing with 2 bristles baso-anteriorly and with 3 hamuli on vein R1, mem-
brane largely glabrous near vein cu-a; tarsal claws without lobe, with setae, but often
pectinate basally; metasomal tergites often largely sculptured; T1 movably joined to
T2;T1 median area strongly convex and sculptured, with angulate sides and a medio-
longitudinal carina; T1 lateral areas wide; T1 with dorsal carinae but absent basally;
T2 with small smooth medio-basal area, often smooth, rarely rugose, and connected
to median carina posteriorly, lateral grooves wide; second metasomal suture deep and
crenulate; [T3—4 with antero-lateral grooves, and latero-posterior corner protruding,
more or less smooth; T2—4 with sharp lateral crease; T3—5 with transverse posterior
grooves (sometimes absent on T3); hypopygium medium-sized and apically acute, not
emarginate medio-apically; ovipositor normal, subapically upper valve with nodus,
and its lower valve with teeth ventrally.
Biology. Unknown.

Distribution. Oriental.

Key to Chinese species of the genus Indabracon van Achterberg

1 Pterostigma entirely dark brown, or apical 1/5 slightly paler or pale brown;
T1 largely smooth, with a few striae antero-laterally and medially............... 2
- At least basal half of pterostigma yellow and remainder dark brown, some-
times with black spots basally and its apical third; T1 largely coarsely sculp-
tured, especial ly+median area and: lateral CrO@VEs:, s:s0ts en tien teretenredesnns enirercttles é
2 Smooth postero-lateral areas of T3 large; scutellum pale yellowish brown; fore
wing vein 1-SR+M at most weakly curved; T1 pale yellowish brown laterally
and its median area black; ovipositor sheath about 0.75 times as long as fore
ON HS esse eh Aes BU tates aaran sense ras Ree cases Coase aes I. trimaculatus
= Smooth postero-lateral areas of T3 small; scutellum black or reddish brown;
fore wing vein 1-SR+M strongly curved basally; T1 entirely whitish yellow;
ovipositor sheath 0.4—0.6 times as long as fore WiNg 00... cs eeeeseseeeteeseeeeeeee 3

42 Yang Li et. al. / Journal of Hymenoptera Research 76: 39-56 (2020)

3 Head largely reddish brown, face reddish yellow; mesoscutum reddish brown;
hind wing vein 2-SC+R longer than vein 1r-m; in dorsal view length of eye
3.0 times temple; temples strongly narrowed behind eyes...... discolor sp. nov.
— Head largely yellow; mesoscutum yellow, but middle lobe anteriorly and lat-
eral lobes with a black spot; hind wing vein 2-SC+R shorter than vein 1r-m;
in dorsal view length of eye 2.6 times temple; temples linearly narrowed be-

Leb aval WOR on ino atin ini ak ioe adn Mya ty dehy Baie I. albogilvus sp. nov.
4 Fore wing vein 1-SR+M at most weakly curved basally; basal half of pter-
ostigma yellow and its apical half dark brown... eee eeeeeeeeee I. bicolor
— Fore wing vein 1-SR+M strongly curved basally; pterostigma largely yellow
anid sits-apical tlic Yara ys laGK 28 2). Woe ace Sih oe eh ee Rg Rh Le 5
5 Scutellum black medially; T1 reddish yellow laterally; T4—5 entirely black;
fore wing vein CU1b half as long as vein 3-CU1 ......... I. nigricans sp. nov.

- Scutellum yellow medially; T1 black laterally; T4—5 pale yellow laterally, T4
with a large black mark medially, not reaching posterior margin of tergite,
and T'5 with a semicircular black mark medio-basally; fore wing vein CU1b
O-7 Timnes:as long as: vein SIO UT. meses essere enpasontens I. semicircularis sp. nov.

Indabracon albogilvus sp. nov.
http://zoobank.org/A7 DFE4DC-0454-4FDE-A274-63B024080C8A
Figs. 2

Type material. Holotype. 2, China, Yunnan Prov., Xishuangbanna Meng’a, 1050-
1080m, 17.X.1958, Chen Zhizi, No. IOZ(E)1964562 (IZCAS). Paratypes: 19, Chi-
na, Yunnan Prov., Xishuangbanna Yunjinghong, 900m, 28.VI.1958, Zhang Yiran, No.
IOZ(E)1964578 (IZCAS). 12, China, Yunnan Prov., Xishuangbanna Damenglong,
650m, 10.1V.1958, Hong Chunpei, No. IOZ(E)1964560 (IZCAS).

Diagnosis. ‘This new species is very similar to /. trimaculatus (Cameron, 1900),
but can be separated from the latter by the following characters: scutellum black (pale
yellowish brown in /. trimaculatus); fore wing vein cu-a curved basally, slightly postfur-
cal (straight and interstitial in /. trimaculatus); fore wing vein 1-SR+M strongly curved
basally (more or less straight, or weakly curved in /. trimaculatus); smooth postero-
lateral areas of T3 small (large in /. trimaculatus); ovipositor sheath 0.4—0.5 times as
long as fore wing (about 0.8 times in /. trimaculatus).

Description. Holotype, 9, length of body 6.4 mm, of fore wing 6.6 mm, of ovi-
positor sheath 2.4 mm.

Head. Antenna with 42 segments; apical antennal segment strongly acute, 2.1
times longer than its maximum width (Fig. 21); third segment 1.1 and 1.2 times longer
than fourth and fifth, respectively, the latter 1.3 times longer than wide; length of
maxillary palp 0.8 times height of head; malar suture present, and with sparse, short
setae (Fig. 2i); clypeus height: inter-tentorial distance: tentorio-ocular distance = 3: 5:
3; clypeus with sparse, long setae; eye hardly emarginated (Fig. 2g); face with some

The braconid genus \ndabracon van Achterberg in China 43

punctures, especially laterally (Fig. 2g); eye height: shortest distance between eyes:
head width = 20: 18: 41; frons largely smooth except for a few weak punctures, with
a strong narrow median groove (Fig. 2h); vertex largely smooth except for a few weak
punctures, and with some sparse short setae; POL: OD: OOL = 4: 4: 11; length of
malar space 1.6 times basal width of mandible; length of eye 2.4 times temple in dor-
sal view; temples largely glabrous except for a few short setae, and directly narrowed
behind eyes (Fig. 2h).

Mesosoma. Length of mesosoma 1.8 times its height (Fig. 2c); notauli impressed
anteriorly half (Fig. 2d); mesoscutum smooth, with sparse long setae (Fig. 2d); scutel-
lar sulcus wide, deep, and with crenulae (Fig. 2d); scutellum distinctly convex, sparsely
punctate, and with dense short setae posteriorly; metanotum strongly convex medially,
and with a short median carina anteriorly (Fig. 2d); propodeum largely smooth except
for some crenulae posteriorly, and with sparse setae medially, and dense, long setae
laterally (Fig. 2d).

Wings. Fore wing (Fig. 2a): SR1: 3-SR: r = 12: 9: 2; 1-SR+M weakly curved
after arising from 1-M, and 1.5 times longer than 1-M; 2-SR: 3-SR: r-m = 8: 18: 5;
CU1b 0.8 times as long as 3-CU1; cu-a weakly postfurcal, and slightly bent basally to-
wards base of wing. Hind wing (Fig. 2b): 1r-m more or less straight; SC+R1: 2-SC+R:
Troma = ORS e7.

Legs. Length of fore femur: tibia: tarsus = 18: 21: 25; length of hind femur: tibia:
basitarsus = 25: 37: 12; length of femur, tibia and basitarsus of hind leg 3.8, 6.7 and
4.0 times their maximum width, respectively.

Metasoma. Length of T1 0.9 times its apical width, median area convex and stri-
ate-rugose, lateral areas largely smooth but anteriorly striate-rugose (Fig. 2j); lateral
grooves of Tl sparsely and weakly crenulate anteriorly (Fig. 2j); [2 largely coarsely
sculptured, but medio-basal area smooth (Fig. 2e); antero-lateral grooves of T2 de-
veloped and crenulate (Fig. 2e); second suture deep and crenulate, wide and straight
medially, narrow laterally (Fig. 2e); T3—4 with antero-lateral grooves, and latero-pos-
terior corner small; T3—5 coarsely sculptured, and with crenulate transverse subpos-
terior groove (Fig. 2e); T6—7 largely smooth, and with spare long setae posteriorly;
hypopygium acute apically, not reaching level of apex of metasoma; ovipositor sheath
0.4 times as long as fore wing.

Colour. Largely black (Fig. 1); head yellow, but antenna, eyes, and mandible api-
cally black; prothorax, notaulic area, median mesoscutal lobe posteriorly and tegulae
yellow (Fig. 2c, d, g, h); fore legs (except for first segment of tarsus posteriorly, sec-
ond—fifth segment of tarsus, and claws black) yellow; T1 whitish yellow, T6-—7 pale yel-
low posteriorly (Fig. 2e, j); wing membrane fuscate, pterostigma (except basal yellow
patch) and veins dark brown (Fig. 2a, b).

Variation. Length of body of female 6.4-8.3 mm, of fore wing of female 6.5—
7.6 mm, and of ovipositor sheath 2.4—3.1 mm; antenna of female with 40-44 segments;
length of mesosoma 1.6—1.8 times its height; fore wing vein CU1b 0.6—0.8 times as long
as vein 3-CU1; tegulae sometimes black, and pterostigma sometimes uniformly black.

Biology. Unknown.

44 Yang Li et. al. / Journal of Hymenoptera Research 76: 39-56 (2020)

Figure |. /ndabracon albogilvus sp. nov., 2, holotype, habitus lateral.

Distribution. China (Yunnan).
Etymology. Named after the whitish yellow colour of the T1: “albogilvus” is Latin
for “whitish yellow”.

Indabracon bicolor Yang, Chen & Liu, 2006

Indabracon bicolor Yang, Chen & Liu, 2006a: 321; Chen et Yang, 2006: 123.

Biology. Unknown.
Distribution. China (Fujian).
Note. ‘The type specimens of this species were collected in SE China (Fujian).

The braconid genus Indabracon van Achterberg in China 45

Figure 2. [ndabracon albogilvus sp. nov., 2, holotype a fore wing b hind wing € mesosoma, lateral view

d mesosoma, dorsal view € metasoma, dorsal view f hind leg, lateral view g head, front view h head, dorsal
view i head, lateral view j first metasomal tergite, dorsal view k scapus outer side, lateral view I apex of

antenna M apex of ovipositor, lateral view.

46 Yang Li et. al. / Journal of Hymenoptera Research 76: 39-56 (2020)

Indabracon discolor sp. nov.
http://zoobank.org/397 DBCAC-5BB8-4675-87BD-3B9FA19B2A49
Figs 3, 4

Type material. Holotype. 2, China, Yunnan Prov., Xishuangbanna Meng’a, 1050-
1080m, 20.VHI.1958, Pu Puji, No. IOZ(E)1964571 (IZCAS). Paratypes: 12, same
label data, but Wang Shuyong, No. IOZ(E)1964563 (IZCAS).

Diagnosis. This new species is very similar to / albogilvus sp. nov., but can be
separated from the latter by the following characters: head largely reddish brown, but
face reddish yellow (largely yellow in 1. albogilvus); mesoscutum reddish brown (yellow,
but lobes with black spot in 1. albogilvus); hind wing vein 2-SC+R longer than vein
Ir-m (shorter than vein 1r-m in L. albogilvus); in dorsal view length of eye 3.0 times
temple and temples strongly narrowed behind eyes (length of eye 2.6 times temple and
temples gradually narrowed behind eyes in /. albogilvus).

Description. Holotype, 9, length of body 9.7 mm, of fore wing 9.1 mm, of ovi-
positor sheath 5.6 mm.

Head. Antenna with 56 segments; apical antennal segment strongly acute, 1.8
times longer than its maximum width (Fig. 41); third segment 1.2 and 1.3 times longer
than fourth and fifth, respectively, the latter as long as wide; length of maxillary palp
0.8 times height of head; malar suture rather weak, punctate and with short setae (Fig.
4i); clypeus height: inter-tentorial distance: tentorio-ocular distance = 3: 14: 7; clypeus
with dense, long setae; eye hardly emarginated (Fig. 4g); face coarsely rugose, with
some striae and long setae laterally (Fig. 4g); eye height: shortest distance between eyes:
head width = 22: 18: 39; frons largely smooth except for a few weak punctures, with
some sparse short setae and a strong median groove (Fig. 4h); vertex largely smooth
except for a few weak punctures, and with some sparse short setae; POL: OD: OOL =
3: 4: 6; length of malar space 1.3 times basal width of mandible; length of eye 3.0 times
temple in dorsal view; temples largely glabrous except for a few long setae, and directly
narrowed behind eyes (Fig. 4h).

Mesosoma. Length of mesosoma 1.7 times its height (Fig. 4c); notauli impressed
anteriorly half (Fig. 4d); mesoscutum smooth, with sparse long setae (Fig. 4d); scutellar
sulcus wide, deep, and with crenulae (Fig. 4d); scutellum distinctly convex, moderately
densely punctate, and with dense short setae posteriorly; metanotum strongly con-
vex medially, and with a short median carina anteriorly (Fig. 4d); propodeum largely
smooth except for a few weak punctures and some crenulae medio-posteriorly, and
with sparse setae medially, and dense, long setae laterally (Fig. 4d).

Wings. Fore wing (Fig. 4a): SR1: 3-SR: r = 29: 26: 4; 1-SR+M strongly angled
after arising from 1-M, and 1.5 times longer than 1-M; 2-SR: 3-SR: r-m = 8: 26: 7;
CU1b 0.5 times as long as 3-CU1; cu-a weakly postfurcal, and rather weakly bent
basally towards base of wing. Hind wing (Fig. 4b): 1r-m more or less straight; SC+RI1:
2-SC+R: Ir-m = 23: 10: 7.

The braconid genus \ndabracon van Achterberg in China 47

Figure 3. /ndabracon discolor sp. nov., 2, holotype, habitus lateral.

Legs. Length of fore femur: tibia: tarsus = 21: 25: 30; length of hind femur: tibia:
basitarsus = 33: 50: 18; length of femur, tibia and basitarsus of hind leg 3.7, 8.3 and
6.0 times their maximum width, respectively.

Metasoma. Length of T1 1.1 times its apical width, median area convex and coarsely
rugose, lateral areas largely smooth except for with a few striae anteriorly (Fig. 4)); lateral
grooves of I'l sparsely crenulate (Fig. 4j); T2 largely coarsely sculptured, but medio-basal
area smooth (Fig. 4e); antero-lateral grooves of T2 strongly developed and crenulate (Fig.
4e); second suture deep and crenulate, wide and straight medially, narrow laterally (Fig.
4e); [3-4 with antero-lateral grooves, and latero-posterior corner medium-sized; T3—5
coarsely sculptured, and with crenulate transverse subposterior groove (Fig. 4e); T6—7
largely weakly rugose, and with spare long setae posteriorly; hypopygium acute apically,
not reaching level of apex of metasoma; ovipositor sheath 0.6 times as long as fore wing.

Colour. Largely black (Fig. 3); head and mesosoma largely reddish brown, but
antenna, eyes, mandible apically and propodeum black, face reddish yellow (Fig. 4c, d,
g); fore femur and tibia somewhat infuscate; T1 whitish yellow (Fig. 4j); wing mem-
brane infuscate, pterostigma and veins dark brown (Fig. 4a, b).

48 Yang Li et. al. / Journal of Hymenoptera Research 76: 39-56 (2020)

Figure 4. Indabracon discolor sp. nov., 2, holotype a fore wing b hind wing ¢ mesosoma, lateral view
d mesosoma, dorsal view € metasoma, dorsal view f hind leg, lateral view g head, front view h head, dorsal

view i head, lateral view j first metasomal tergite, dorsal view k scapus outer side, lateral view | apex of

antenna M apex of ovipositor, lateral view.

The braconid genus \ndabracon van Achterberg in China 49

Variation. Length of body of female 7.3-9.7 mm, of fore wing of female 6.8—
9.1 mm, and of ovipositor sheath 2.7—5.6 mm; ovipositor sheath 0.4—0.6 times as long
as fore wing; fore femur and tibia sometimes reddish yellow ventrally.

Biology. Unknown.

Distribution. China (Yunnan).

Etymology. Named after the T1 whitish yellow, while the remainder tergites black:
“discolor” is Latin for “not of the same color”.

Indabracon nigricans sp. nov.
http://zoobank.org/3AD4EAE3-A4EE-453A-A4C3-D4FB71EDE1DD
Figs 5, 6

Type material. Holotype. 2, China, Yunnan Prov., Xishuangbanna Yunjinghong,
650m, 23.VII.1957, Zang Lingchao, No. IOZ(E)1964520 (IZCAS). Paratype: 1°,
China, Yunnan Prov., Xishuangbanna Cheli-Damenglong, 600m, 29.IV.1957, Liu
Dahua, No. IOZ(E) 1964541 (IZCAS).

Diagnosis. This new species is very similar to J. bicolor Yang et Chen, 2006, but
can be separated from the latter by the following characters: scutellum black medially
and remainder yellow, (entirely yellow in . bicolor); apical third of pterostigma largely
blackish (apical half of pterostigma dark brown and remainder yellow in /. bicolor);
fore wing vein CU1b relatively short, 0.5 times as long as vein 3-CU1 (0.8 times in /
bicolor); T1 reddish yellow laterally (whitish yellow in Z. bicolor) and medio-basal area
of T2 rugose (smooth in I. bicolor).

Description. Holotype, 2, length of body 9.2 mm, of fore wing 8.7 mm, of ovi-
positor sheath 5.6 mm.

Head. Antenna incomplete, 49 segments remaining; third segment 1.2 and 1.3
times longer than fourth and fifth, respectively, the latter 1.1 times longer than wide;
length of maxillary palp 0.9 times height of head; malar suture rather weak, sculptured,
and with short setae (Fig. 6i); clypeus height: inter-tentorial distance: tentorio-ocular
distance = 6: 10: 7; clypeus with dense, long setae; eye weakly emarginated (Fig. 6g);
face punctate, especially laterally (Fig. 6g); eye height: shortest distance between eyes:
head width = 14: 15: 30; frons largely smooth except for a few weak punctures, with
some sparse short setae and a strong median groove (Fig. Gh); vertex largely smooth
except for a few weak punctures, and with some sparse short setae; POL: OD: OOL =
4: 5: 12; length of malar space 1.4 times basal width of mandible; length of eye 2.0
times temple in dorsal view; temples largely glabrous except for a few long setae, and
subparallel-sided behind eyes (Fig. 6h).

Mesosoma. Length of mesosoma 1.6 times its height (Fig. 6c); notauli impressed
anteriorly half (Fig. 6d); mesoscutum largely smooth except for a few weak punc-
tures, with sparse short setae (Fig. 6d); scutellar sulcus moderately narrow, deep, and
with crenulae (Fig. 6d); scutellum distinctly convex, punctate especially posteriorly;

50 Yang Li et. al. / Journal of Hymenoptera Research 76: 39-56 (2020)

Figure 5. /ndabracon nigricans sp. nov., 2, holotype, habitus lateral.

metanotum strongly convex medially, and with a short median carina anteriorly (Fig.
6d); propodeum largely smooth except for a few weak punctures and some crenulae
posteriorly, and with sparse setae medially, and dense, long setae laterally (Fig. 6d).

Wings. Fore wing (Fig. 6a): SR1: 3-SR: r = 23: 16: 3; 1-SR+M strongly bent
after arising from 1-M, and 1.7 times longer than 1-M; 2-SR: 3-SR: r-m = 6: 16: 5;
CU 1b 0.5 times as long as 3-CU1; cu-a weakly postfurcal, and nearly not bent basal-
ly. Hind wing (Fig. 6b): 1r-m straight or nearly so; SC+R1: 2-SC+R: lr-m = 14: 4: 9.

Legs. Length of fore femur: tibia: tarsus = 11: 13: 16; length of hind femur: tibia:
basitarsus = 27: 42: 14; length of femur, tibia and basitarsus of hind leg 3.0, 6.0 and
3.5 times their maximum width, respectively.

Metasoma. Length of T1 0.9 times its apical width, median area convex and
strongly coarsely rugose, medio-longitudinal carina only present posteriorly, lateral
areas relatively narrow and smooth (Fig. 6j); lateral grooves of T1 distinctly crenulate
(Fig. 6j); [2 coarsely sculptured including medio-basal area (Fig. 6e); antero-lateral
grooves of [2 strongly developed and crenulate (Fig. 6e); second suture deep and cren-
ulate, wide and curved medially, narrow laterally (Fig. Ge); T3—4 with antero-lateral
grooves, and latero-posterior corner medium-sized; T3—5 coarsely sculptured, and
with crenulate transverse subposterior groove (Fig. 6e); [6-7 largely rugose, and with
dense long setae posteriorly; hypopygium acute apically, not reaching level of apex of
metasoma; ovipositor sheath 0.6 times as long as fore wing.

Colour. Largely black (Fig. 5); head largely yellow, except for antenna (but scapus
yellow ventrally), eyes, stemmaticum and apex of mandible black (Fig. 6g, h, k); pro-

The braconid genus Indabracon van Achterberg in China |

Figure 6. /ndabracon nigricans sp. nov., 2, holotype a fore wing b hind wing ¢ mesosoma, lateral
view d mesosoma, dorsal view € metasoma, dorsal view f hind leg, lateral view g head, front view h head,

dorsal view i head, lateral view j first metasomal tergite, dorsal view k scapus outer side, lateral view I apex

of ovipositor, lateral view.

52 Yang Li et. al. / Journal of Hymenoptera Research 76: 39-56 (2020)

thorax, notaulic area, median mesoscutal lobe posteriorly, tegulae, and scutellum lat-
erally yellow (Fig. 6c, d); fore (except for black claws) and middle legs (but coxa and
claws black) yellow; T1 yellowish brown anteriorly and laterally, T6—7 pale yellow (Fig.
Ge, j); wing membrane infuscate, and pterostigma (but blackish apically) yellow, veins
dark brown (Fig. 6a, b).

Variation. Length of body of female 9.2—-9.4 mm, of fore wing of female 8.4—
8.7 mm, and of ovipositor sheath 5.6—6.2 mm; antenna with 51 segments; apical
antennal segment acute, twice longer than wide; length of mesosoma 1.6—1.7 times
its height; ovipositor sheath 0.6—0.7 times as long as fore wing.

Biology. Unknown.

Distribution. China (Yunnan).

Etymology. Named after the blackish colour of the metasomal tergites: “nigricans”
is Latin for “blackish”.

Indabracon semicircularis sp. nov.
http://zoobank.org/6609A FE3-BA4B-4F79-B93D-143E8B2E637A
Figs 7, 8

Type material. Holotype. 2, China, Yunnan Prov., Xishuangbanna Meng’a, 1050-
1080m, 13.X.1958, Wang Shuyong, No. IOZ(E) 1964518 (IZCAS).

Diagnosis. This new species is very similar to J. bicolor Yang et Chen, 2006, but
can be separated from the latter by the following characters: pterostigma largely yellow
(apical half of pterostigma dark brown in 1. bicolor); fore wing vein 1-SR+M strongly
curved basally (at most weakly curved basally in 1. bicolor); T1 black laterally (whitish
yellow laterally in 1. bicolor); T2 with sub-lateral areas (sub-lateral areas absent in /.
bicolor); and ovipositor sheath 0.8 times as long as fore wing (0.6 times in /. bicolor).

Description. Holotype, 2, length of body 10.0 mm, of fore wing 8.8 mm, of
ovipositor sheath 7.2 mm.

Head. Antenna with 54 segments; apical antennal segment acute, 2.1 times longer
than its maximum width (Fig. 81); third segment 1.2 and 1.3 times longer than fourth
and fifth, respectively, the latter 1.1 times longer than wide; length of maxillary palp 0.8
times height of head; malar suture moderately developed, sculptured and with dense,
short setae (Fig. 8i); clypeus height: inter-tentorial distance: tentorio-ocular distance =
5: 12: 10; clypeus with sparse, long setae; eye weakly emarginated (Fig. 8g); face punc-
tate, and with dense. short setae (Fig. 8g); eye height: shortest distance between eyes:
head width = 18: 18: 37; frons largely smooth except for a few weak punctures, with a
strong median groove (Fig. 8h); vertex largely smooth except for some sparse punctures,
and with some sparse short setae; POL: OD: OOL = 4: 5: 14; length of malar space 1.7
times basal width of mandible; length of eye 1.5 times temple in dorsal view; temples
smooth, with some long setae, and rather weakly narrowed behind eyes (Fig. 8h).

Mesosoma. Length of mesosoma 1.7 times its height (Fig. 8c); anterior half of
notauli impressed (Fig. 8d); mesoscutum smooth, with sparse long setae (Fig. 8d);

The braconid genus \ndabracon van Achterberg in China 53

a

¥

i} : J
i Sor
Se — a
cm
_

»

fed

as ‘ a
a
f a! :

§
_
>

1.0mm

Figure 7. /ndabracon semicircularis sp. nov., 2, holotype, habitus lateral.

scutellar sulcus moderately wide, deep, and with crenulae (Fig. 8d); scutellum distinct-
ly convex, smooth, and with some short setae posteriorly; metanotum strongly con-
vex medially, and with a short median carina anteriorly (Fig. 8d); propodeum largely
smooth except for some crenulae posteriorly, and with sparse setae medially, and dense,
long setae laterally (Fig. 8d).

Wings. Fore wing (Fig. 8a): SR1: 3-SR: r = 22: 16: 3; 1-SR+M distinctly bent after
arising from 1-M, and 1.7 times longer than 1-M; 2-SR: 3-SR: r-m = 7: 16: 6; CU1b
0.7 times as long as 3-CU1; cu-a subinterstitial, and nearly straight basally. Hind wing
(Fig. 8b): 1r-m more or less straight; SC+R1: 2-SC+R: Ir-m = 6: 2: 3.

Legs. Length of fore femur: tibia: tarsus = 19: 22: 28; length of hind femur: tibia:
basitarsus = 30: 47: 17; length of femur, tibia and basitarsus of hind leg 3.7, 9.4 and
4.9 times their maximum width, respectively.

Metasoma. 1 | as long as its apical width, median area convex and strongly coarse-
ly rugose, with a few carinae, medio-longitudinal carina only present posteriorly, lateral
areas relatively narrow and smooth (Fig. 8); lateral grooves of T1 distinctly crenulate
(Fig. 8j); [2 largely coarsely striate-rugose except for smooth medio-basal area (Fig.
8e); antero-lateral grooves of T2 wide but rather shallow, weakly crenulate (Fig. 8e);
second suture deep and crenulate, wide and more or less straight medially, narrow lat-
erally (Fig. 8e); T3—4 with antero-lateral grooves, and latero-posterior corner medium-
size; [3-4 striate-rugose (T4 relatively weak so); T3—5 with crenulate transverse sub-

54 Yang Li et. al. / Journal of Hymenoptera Research 76: 39-56 (2020)

Figure 8. /ndabracon semicircularis sp. nov., 2, holotype a fore wing b hind wing € mesosoma, lateral
view d mesosoma, dorsal view € metasoma, dorsal view f hind leg, lateral view g head, front view h head,

dorsal view i head, lateral view j first metasomal tergite, dorsal view k scapus outer side, lateral view I apex

of antenna M apex of ovipositor, lateral view.

The braconid genus \ndabracon van Achterberg in China 55

posterior groove (Fig. 8e); T5—7 largely smooth, and with some long setae posteriorly;
hypopygium acute apically, not reaching level of apex of metasoma; ovipositor sheath
0.8 times as long as fore wing.

Colour. Largely black (Fig. 7); head largely yellow, but antenna, eyes, stemmati-
cum and apex of mandible black (Fig. 8g, h); prothorax, notaulic area, median mesos-
cutal lobe posteriorly, tegulae, and scutellum yellow (Fig. 8c, d); fore (but claws black)
and middle legs (but tarsi and claws blackish) yellow; T4—5 yellow, but T4 black medi-
ally (except for posterior margin) and T5 with a half-rounded black spot medio-basally
(Fig. 8e); posterior margins of T6—7 pale yellow (Fig. 8e); wing membrane yellowish,
pterostigma (except for apical dark brown spot) yellow, veins largely yellow, hind wing
vein 2-M dark brown (Fig. 8a, b).

Biology. Unknown.

Distribution. China (Yunnan).

Etymology. Named after the shape of the black spot on the T5: “semi” and “circu-

laris” are Latin for “half” and “round”, respectively.

Indabracon trimaculatus (Cameron, 1900)

Spinaria trimaculata Cameron, 1900; 81; Shenefelt 1975: 1259 (generic position
doubtful); Quicke et Walker, 1991: 420 (comparison with Bicarinibracon).
Indabracon trimaculatus (Cameron): van Achterberg, 1992: 387; Chen et Yang, 2006: 125.

Biology. Unknown.
Distribution. China (Fujian); India.
Note. Chen et Yang (2006) reported the species from Fujian (SE China).

Acknowledgements

We thank Dr. Kees van Achterberg for his help during the course of study and critical
reading of the manuscript. We also thank Mrs Hong Liu (IZCAS) for the loan of speci-
mens. This research was supported by the Key International Joint Research Program of
National Natural Science Foundation of China (31920103005), the General Program
of National Natural Science Foundation of China (31702035), and the National Key
Research and Development Plan (2017YFD0201000).

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