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Five new Coccidae
Vol 31, Page 5, Date 1899
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Notes on Arkansas Truxalina
Vol 31, Page 53, Date 1899
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A classification of the North American Myrmeleonidae
Vol 31, Page 67, Date 1899
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Six new Ottawa Proctotrypidae
Vol 31, Page 77, Date 1899
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A few Canadian longicorns
Vol 31, Page 107, Date 1899
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Classification of the entomophilous wasps, or the superfamily Sphegoidea
Vol 31, Page 145, Date 1899
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The North American species of Orphulella
Vol 31, Page 177, Date 1899
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Cockerell, T.D.A. (1899). Tables for the determination of the genera of Coccidae
Vol 31, Page 273, Date 1899
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Classification of the entomophilous wasps, or the superfamily Sphegoidea
Vol 31, Page 322, Date 1899
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New genera and species of Nycteribidae and Hippoboscidae
Vol 31, Page 333, Date 1899