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Synonymic notes (Lepid., Phalaenidae)
Vol 4, Page 1, Date 1927
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New Phalænidae (Lepid.)
Vol 4, Page 4, Date 1927
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Ten new Lepidoptera from Mexico
Vol 4, Page 7, Date 1927
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New species of North American Rhynchophora (Coleoptera)
Vol 4, Page 11, Date 1927
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A new species of Diplocysta from the Philippines (Hemip.-Tingitidae)
Vol 4, Page 18, Date 1927
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Key to the subtribe Helocharae Orchym. (Coleoptera-Hydrophilidae) of Boreal America
Vol 4, Page 19, Date 1927
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Four new California Thysanoptera with notes on two other species
Vol 4, Page 30, Date 1927
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Two new types of desert bees
Vol 4, Page 41, Date 1927
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Two interesting beetles from Carlsbad cavern
Vol 4, Page 44, Date 1927
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On the standing of genus Tibicen Latr
Vol 4, Page 47, Date 1927
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Studies in the Melyridae no. 6
Vol 4, Page 49, Date 1927
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A short review of the tribes Orsodacnini and Criocerini of the Coleopterous family Chrysomelidae, with special reference to species of western United States
Vol 4, Page 54, Date 1927
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Bees belonging to the family Bremidae taken in western Oregon, with notes
Vol 4, Page 69, Date 1927
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The celery leaf-tyer, Phlyctaenia rubigalis Guen., in California (Lep.)
Vol 4, Page 77, Date 1927
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A new Ripersia (Homop.) attacking wheat
Vol 4, Page 85, Date 1927
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Synonymic notes (Lepid., Arctiidae)
Vol 4, Page 87, Date 1927
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A Palmacorixa from Mexico (Hemiptera, Corixidae)
Vol 4, Page 94, Date 1927
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A review of genus Zerene Hbn., in the United States (Lepid., Rhopalocera)
Vol 4, Page 97, Date 1928
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Notes and descriptions of new species of Lucani-dae and Cerambycidae (Coleoptera) from western North America
Vol 4, Page 105, Date 1928
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A short review of the tribes Orsodacnini and Criocerini of the Coleopterous family Chrysomelidae with special reference to species of western United States
Vol 4, Page 114, Date 1928
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Bees belonging to the family Bremidae taken in western Oregon, with notes
Vol 4, Page 121, Date 1928
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California Microlepidoptera III
Vol 4, Page 129, Date 1928
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Distinction between three species of Eumerus (Syrphidae, Diptera), with description of a new species
Vol 4, Page 137, Date 1928
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The genus Brachypteromyia Williston (Diptera Pupipara; Hippoboscidae)
Vol 4, Page 140, Date 1928
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Alaudes
Vol 4, Page 145, Date 1928
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Notes and descriptions of new species of Scarabaeidae from Western North America
Vol 4, Page 151, Date 1928
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Three new species of Rhaphium (Diptera)
Vol 4, Page 166, Date 1928
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Three new Aphids from Utah
Vol 4, Page 169, Date 1928
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A new species of Melandryidae (Coleoptera)
Vol 4, Page 173, Date 1928
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The species of Sinodendron (Lucanidae)
Vol 4, Page 175, Date 1928
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Mellissodes mysops Cockerell nesting in Oregon (Anthophoridae, Hym.)
Vol 4, Page 176, Date 1928
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A misidentified Hadronema (Hemiptera)
Vol 4, Page 182, Date 1928
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Two interesting additions to the Hemipterous fauna of California
Vol 4, Page 190, Date 1928