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Factors in Aquatic Environments
Volume 21, Page 1
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Relations of Trichoptera to Their Environment
Volume 21, Page 4
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Odonata in Relation to the Hydrophytic Environment
Volume 21, Page 9
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Dragonflies of the vicinity of New York City with a description of a new species
Volume 21, Page 11
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Aquatic Hemiptera
Volume 21, Page 29
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Aquatic Coleoptera
Volume 21, Page 32
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Some Habits of the Dytiscidæ
Volume 21, Page 43
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Environment of Hydrophidæ
Volume 21, Page 54
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The Relation of Mosquitoes to Their Environment
Volume 21, Page 55
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Gall Midges in an Aquatic or Semiaquatic Environment
Volume 21, Page 62
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Tabanidæ as Inhabitants of the Hydrophytic Area
Volume 21, Page 63
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Syrphidæ in the Hydrophytic Area
Volume 21, Page 66
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Three new cicindelids
Volume 21, Page 67
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Frederick Blanchard
Volume 21, Page 69
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Proceedings of the New York Entomological Society
Volume 21, Page 72
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Chris. H. Critical notes on the species of Haliplidae of America north of Mexico with descriptions of new species
Volume 21, Page 91
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The Passing of the Hickory Nut?
Volume 21, Page 123
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The North American Species of Lispa (Diptera; Anthomyidæ)
Volume 21, Page 126
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On Trichiopoda Latreille, Polistomyia Townsend and Triehopodopsis new genus
Volume 21, Page 147
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Notes on African Myrmeleonidae
Volume 21, Page 149
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Miscellaneous Notes
Volume 21, Page 157
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Proceedings of the New York Entomological Society
Volume 21, Page 163
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Two Additions to the List of New Jersey Cone-Headed Grasshoppers
Volume 21, Page 177
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An Artificial Table of the Species of Hadena, Etc., of Eastern North America, North of the Carolinas
Volume 21, Page 179
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The Genus Philobia Duponchel, and Some Representatives in Our Fauna. (Lep., Geom.)
Volume 21, Page 186
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Report on a collection of craneflies (Tipulidae, Dipt.) from the Colombian Andes, taken by Mr. John Thomas Lloyd
Volume 21, Page 193
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Descriptions of gall midges
Volume 21, Page 213
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A synopsis of the dipterous groups Agromyzinae, Milichiinae, Ochthiphilinae, and Geomyzinae
Volume 21, Page 219
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Miscellaneous Notes
Volume 21, Page 273
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Proceedings of the New York Entomological Society
Volume 21, Page 275
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A synopsis of the dipterous groups Agromyzinae, Milichiinae, Ochthiphilinae, and Geomyzinae
Volume 21, Page 283
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Notes on Exoristidæ (Tachinidæ Auctt.) and Allies
Volume 21, Page 301
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Notes on the Feeding and Rearing of the Midge, Chironomus cayugæ Johannsen
Volume 21, Page 305
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Notes on Some North American Species of Rhizophagus (Col. Nitid.)
Volume 21, Page 309
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Miscellaneous Notes
Volume 21, Page 311
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Proceedings of the New York Entomological Society
Volume 21, Page 313