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Further observations on bees which take pollen from plants of the genus Solarium (Hymenoptera: Apoidea)
Vol 39, Page 1
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New species and new records of rare species of Pygostenini from the Congo Republic (Coleoptera: Staphylinidae)
Vol 39, Page 19
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A new genus and species of mayfly from Peru (Ephemeroptera: Leptophlebiidae)
Vol 39, Page 34
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Some new North American Callidiini with notes on the synonymy of Pronocera Motschulsky and Gonocallus Le Conte (Coleoptera: Cerambycidae)
Vol 39, Page 37
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Cone beetles of the genus Conophthorus in California (Coleoptera: Scolytidae)
Vol 39, Page 43
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A new bat bug from southern Chile (Hemiptera: Cimicidae)
Vol 39, Page 51
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A new species of the genus Trachusa from California with a key to the known species (Hymenoptera: Megachilidae)
Vol 39, Page 56
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Key to Diplotaxis of Baja California (Coleoptera: Scarabaeidae)
Vol 39, Page 67
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Some undescribed North American Malthini (Coleoptera: Cantharidae)
Vol 39, Page 75
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The North American genera related to Gaurotes with a key to the Mexican component species (Coleoptera: Cerambycidae)
Vol 39, Page 81
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A new species of Omithonyssus from the white-tailed antelope squirrel, with a rediagnosis of the genus Omithonyssus (Acarina : Dermanyssidae)
Vol 39, Page 89
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A new species of Apache from California (Homoptera: Derbidae)
Vol 39, Page 98
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Observations on Aedes niphadopsis Dyar & Knab and campestris Dyar & Knab, Nevada (Diptera-Culicidae)
Vol 39, Page 109
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Distributional and food plant records in the cyarUpemis subgroup of the genus Lytta (Coleoptera: Meloidae)
Vol 39, Page 124
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Notes on the leaf-cutter bee Megachile (Entricharaea) gratiosa Gerstaecker (Hymenoptera: Megachilidae)
Vol 39, Page 129
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New species and new records of Pygostenini from Uganda and Kenya (Coleoptera: Staphylinidae)
Vol 39, Page 135
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Notes on the biology and distribution of Paracotalpa granicollis Haldeman (Coleoptera: Scarabeidae)
Vol 39, Page 154
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New Acrididae from western North America (Orthoptera)
Vol 39, Page 157
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Observations on larval and pupal habits of the juniper cone moth, Periphca atrata Hodges (Lepidoptera: Gelechioidea)
Vol 39, Page 177
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Two new species of Chyphotes from southwestern United States (Hymenoptera: Mutillidae)
Vol 39, Page 186
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Descriptions of new species of Onagrandrena, principally of the Andrena oenotherae complex (Hymenoptera : Andrenidae)
Vol 39, Page 189
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A note about letters from Willi am Henry Edwards to William Greenwood Wright, and clues about certain dates of publication contained therein
Vol 39, Page 198
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Biological notes on Megachile concinna Smith in Arizona (Hymenoptera: Megachilidae)
Vol 39, Page 201
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Some new North American Cerambycidae
Vol 39, Page 207
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A Observations on the adult behavior of Xylotrechus nauticus (Mannerheim) (Coleoptera: Cerambycidae)
Vol 39, Page 213
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Observations on populations of adult beaver-beetles, Platypsyllus castorts (Platypsyllidae: Coleoptera)
Vol 39, Page 215
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Notes and synonymy of some Neotropical Sphex and Isodontia described by E. Taschenberg and S.Rohwer (Hymenoptera: Sphecidae)
Vol 39, Page 228
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Sphaerocerid flies from South and Central America in the collection of the California Academy of Sciences (Diptera)
Vol 39, Page 231
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Some species of Typhlodromus from dwarf mistletoes in North America
Vol 39, Page 247
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Additional records oiPlatycleis tessellata (Charpentier) in California with biological notes (Orthoptera: Tettigoniidae)
Vol 39, Page 252
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Description of the immature stages of Cryptolabis magnistyia Alexander (Diptera: Tipulidae)
Vol 39, Page 255
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A new Oedipodine grasshopper from California (Orthoptera: Acrididae)
Vol 39, Page 260
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A new species of the genus Malezonotus from California (Hemiptera: Heteroptera: Lygaeidae)
Vol 39, Page 264
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A new species of Anthidium from California (Hymenoptera: Megachilidae)
Vol 39, Page 267
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Supposed larva of Protanyderus vipio (Osten Sacken) discovered in California (Diptera: Tanyderidae)
Vol 39, Page 272