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Notes on the Bembioid, Stictiella pulla (Handlirsch) (Hymenoptera)
Vol 18, Page 4
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New species of Otitidae from California, (Diptera)
Vol 18, Page 23
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A review of the Myxosargini (Diptera, Stratiomyidae)
Vol 18, Page 49
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Two Mexican species of Xeromegachile (Hymenoptera, Megachilidae)
Vol 18, Page 74
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Key to the males of the genus Atyphloceras with a des-cription of the male of Atyphloceras echis (Siphonaptera)
Vol 18, Page 87
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A new family of Hemiptera-Heteroptera pro-posed for Macrovelia hornii Uhler
Vol 18, Page 90
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Biology of two native Coleopterous predators of the Mountain pine beetle in sugar pine
Vol 18, Page 97
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North Ameri-can bees of the genus Ancyloscelis (Hymenoptera, Anthophoridae)
Vol 18, Page 108
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A new species of Acmaeodera from southern California (Coleoptora; Buprestidao)
Vol 18, Page 113
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Notes and descriptions of Nearctic Megachile (Hymenoptera, Megachilidae)
Vol 18, Page 115
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A synopsis of the gonus Micralictoides (Hymenoptora, Apoidea)
Vol 18, Page 119
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Hebrus Curtis antedates Naeogeus Laporte
Vol 18, Page 124
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Two new centipeds from the Chilibrillo caves, Panama
Vol 18, Iss 3, Page 125
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A new Ctenophthalmus from Formosa (Siphonaptera)
Vol 18, Page 133
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Collecting wild bees in the Yosemite
Vol 18, Page 136
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A new species of Tiphia, from California (Hymenoptera, Tiphiidae)
Vol 18, Page 139
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An analysis of the Odynerus congressus group of the subgenus Leptochilus (Hymenoptera, Vespidae)
Vol 18, Page 145
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Revision of the Termitaphididae (Hemiptera)
Vol 18, Page 155
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A new Mirid from Oregon (Hemiptera)
Vol 18, Page 160
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On the date of publication of Laporte's Essai
Vol 18, Page 161
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A now Empis of the subgenus Pachymeria (Diptera, Empididae)
Vol 18, Page 163
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Notes on migra-tions, of the painted lady butterfly, in 1941
Vol 18, Page 165
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Some Col-lembola records for the Pacific Coast and a description of a new species
Vol 18, Page 177
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Notes on synonymy in the genus Cerceris-I. (Hymenoptera-Sphecidae)
Vol 18, Page 187
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A new apterous Aradid from Australia (Hemiptera)
Vol 18, Page 190
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A new species of Callidium from the coast redwood, Sequoia sempervirens (Coleoptora, Cer-ambyeidae)
Vol 18, Page 192