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Notes on two Oxybelid wasps in San Francisco, California
Vol 12, Page 1
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Two water beetles that lay their eggs in the frothy egg masses of a frog or tree toad
Vol 12, Page 6
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Two new Dikraneura from the southwest
Vol 12, Page 7
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A preliminary study of the genus Stylops in California (Part I) (Strepsiptera, Stylopidae)
Vol 12, Page 9
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New species of North American weevils in the family Curculionidae, subfamily Brachyrhininae, IV
Vol 12, Page 19
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The species of Stenomorphus (Coleoptera: Carabida), with data on heterogony in S. californicus (Men.)
Vol 12, Page 33
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A revision of the genus Macropogon Motsch
Vol 12, Page 45
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Some bees of the genus Ashmeadiella
Vol 12, Page 56
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New California Aphididae
Vol 12, Page 65
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New Stratiomyidae in the Collection of the California Academy of Sciences
Vol 12, Page 86
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Descriptions and records of Californian Mutillidae
Vol 12, Page 91
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Our knowledge of California Thysanoptera previous to 1900
Vol 12, Page 97
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New Thysanoptera belonging to the genus Thrips Linn
Vol 12, Page 104
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The pacificus group of Cossonus (Coleoptera; Curculionidae)
Vol 12, Page 111
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Two new leafhoppers from tropical America
Vol 12, Page 116
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A new species of mayfly from California (Ephemerida: Baetidae)
Vol 12, Page 120
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Notes on Cicindela plutonica Casey with description of a new subspecies
Vol 12, Page 123
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An annotated list of the Lepturini of Oregon
Vol 12, Page 126
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Bees from northern California
Vol 12, Page 133
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The sawfly genus Empria in North America (Hymenoptera, Tenthredinidae)
Vol 12, Page 172
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On certain species of Cantharis (Telephorus) (Coleoptera)
Vol 12, Page 179
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Some new species of leafhoppers in groups formerly included in Thamnotettix
Vol 12, Page 192
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Observations on the habits of some western Longicorn beetles (Coleoptera, Cerambycidae)
Vol 12, Page 199
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Asilidae, new and otherwise, from the south-west, with a key to the genus Stichopogon
Vol 12, Page 201