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A revision of the dipterous family Clusiodidae (Heteroneuridae)
Vol 20, Page 2, Date 1918
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Description of a new hymenopterous parasite (Braconidae)
Vol 20, Page 18, Date 1918
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Some muscoid synonymy, with one new genus
Vol 20, Page 19, Date 1918
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A new genus of Lepidoptera allied to Leucoptera Hubner
Vol 20, Page 21, Date 1918
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Three new chalcidoid egg-parasites
Vol 20, Page 23, Date 1918
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A new species of Agrilus from Florida (Coleoptera, Buprestidae)
Vol 20, Page 67, Date 1918
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Three new species of Diptera
Vol 20, Page 69, Date 1918
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New sawflies of the subfamily Diprioninae
Vol 20, Page 79, Date 1918
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The genus Cnemedon Egger in North America
Vol 20, Page 127, Date 1918
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A new mosquito (Aedes whitmorei) from Colombia
Vol 20, Page 128, Date 1918
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A synopsis of the species belonging to the chalcidoid genus |Rileya| Ashmead
Vol 20, Page 136, Date 1918
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Notes on and descrip-tions of sawflies belonging to the tenthredinid tribe Homichroini
Vol 20, Page 161, Date 1919
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Some halictine bees in the United States national museum
Vol 20, Page 177, Date 1919
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District of Columbia Diptera; Tabanidae
Vol 20, Page 188, Date 1919
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A new colletid bee from Ecuador
Vol 20, Page 206, Date 1919