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Notes on the Habits of Some Central American Stingless Bees
Vol 20, Page 1
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Meliponine Bees From Central America
Vol 20, Page 10
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Mallophaga from Brazilian birds
Vol 20, Page 15
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A new genus and three new species of Phoridae from North America, with notes on two recently erected genera (Crepidopachys and Pronomiophora Enderlein)
Vol 20, Page 23
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New north american Elateridae and Scarabaeidae
Vol 20, Page 27
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A Giant Coccid From Guatemala
Vol 20, Page 31
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Species of the Genus Gaurax of the Eastern United States
Vol 20, Page 34
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Positive Thigmotropism of Culex Pipiens in Hibernation
Vol 20, Page 36
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Peculiar Habits of Small Diptera, Desmometopa Latipes Meig
Vol 20, Page 37
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An undescribed hymenopterous parasite of the housefly
Vol 20, Page 38
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New Neotropical Antochini (Tipulidae Diptera)
Vol 20, Page 40
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Book Notices
Vol 20, Page 54
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A Synopsis of the Sapromyzidae
Vol 20, Page 57
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Neuropteroid Insects From Brazil
Vol 20, Page 83
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A New Species of Phoridae From New England
Vol 20, Page 90
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Muscoid Parasites of the Cotton—Stainer and Other Lygaeids
Vol 20, Page 91
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The Genus Phryganea (Trichoptera) in the Florissant Shales
Vol 20, Page 95
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A Study of the Clusiodidae, (Heteroneuridæ) of the Eastern United States
Vol 20, Page 97
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On the Tribe Dejeaniini of the Muscoid Family Hystriciidae, With Five New Genera
Vol 20, Page 102
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A New Bee of the Genus Emphor
Vol 20, Page 107
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Ants Collected in Georgia By Dr. J. C. Bradley and Mr. W. T. Davis
Vol 20, Page 112
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On A Collection of Thysanoptera From Panama
Vol 20, Page 119
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The Phytophaga (Except Cassidæ and Hispidæ) of the Stanford Expedition to Brazil
Vol 20, Page 125
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The gall midge fauna of New England
Vol 20, Page 133
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The Life History and Habits of Spalangia Muscidarum Richardson, A Parasite of the Stable Fly
Vol 20, Page 148
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A new genus of Mallophaga
Vol 20, Page 158
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Notes on the Duration of the Pupal Stage in Certain Lepidoptera
Vol 20, Page 161
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Notes on Variation in the Venation of the Species of the Genus Leptogaster
Vol 20, Page 162
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The Life History of Thrypticus Muhlenbergiae Sp. NOV. (Diptera)
Vol 20, Page 164
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Some acalyptrate Muscidae
Vol 20, Page 166
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A Question of Authorship
Vol 20, Page 170
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The dragon-fly genus Agrion (Calepteryx) in Colorado
Vol 20, Page 173
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Didactylomyia Capitata SP. NOV
Vol 20, Page 174
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The Alimentary Canal of Flata and Other Homoptera
Vol 20, Page 175
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On the Early Stages of Some Western Catocala Species
Vol 20, Page 188
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The distribution of some species of Drosophila
Vol 20, Page 202
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Book Review
Vol 20, Page 205