338 



Index. 



Crayfish, 215, 216. 

 Crustacea, 35, 102, 161, 178. 

 Creeping water bugs (see Naurcoridse ) . 

 Curicta hotvardi, 152. 

 Cyclops, 35, 158. 



Daphnians, 34, 35, 138, 158, 179. 



Dawson, 35. 



DeGeer, 13, 14, 91, 117, 158, 208, 234. 



Diatoms, 35, 245, 247. 



Desmids, 35. 



Dogs, 16, 158. 



Duckmeat, 245. 



Duck-weed, 101. 



Dufour, 15, 117, 208, 219, 238. 



E. 



Ecology, 17, 28, 38, 180. 



Economic importance, 17, 35. 



Ege, 43. 



Electric light bug, 141. 



Elodea, 177, 221, 244. 



Embody, 245. 



Enoch, 160. 



Entomostraca, 35, 37, 42, 177. 186, 



191, 197. 

 Epistyllis, 146. 

 Eschscholtz, 15. 

 Essenberg, 117. 

 Euglense, 35, 242, 244, 245, 247. 



P. 

 Fabricius, 14. 

 Fallen, 15. 



Feeding habits of aquatics, 33, 34. 

 Fish, 177, 193, 228, 236. 

 Fish eggs, 158. 

 Fontinalis, 159. 

 Forbes, 216. 

 Form and Function, 38. 

 Fragilaria, 246. 

 Frisch, 13, 151, 158, 208. 



G. 



Gage, 36. 



Galgulidte (see Gelastocoridaj). 



Gelastocoridue, 8, 11, 20, 29, 39, 40, 42, 45. 



Gelastocorida', Biology, 49. 



Gelastocoridae, Key to genera, 46. 



Gelastocoris, 46. 



Gelastocoris, Key to genus, 46. 



Gelastocoris oridatus, 34, 4". 



Gelastocoris variegatvs, 47. 



Gelastocoris liciniis, 47. 



Geoffrey, 13, 14, 157, 211. 



Gerridas, 8, 11, 12, 24, 25, 29, 40, 106. 



GerridsB, Biology of, 116, 121. 



Gerridffi, Key to genera, 107. 



Gerris, 29, 32, 42, 107. 



Gerris argenticollis, 108, 111. 



Gerris buenoi, 108, 111. 



Gerris canaliculatus, 108, 112. 



Gerris conformis, 108, 109. 



Gerris gillettei, 108, 109. 



Gerris, Key to species, 108. 



Gerris marginatus, 25, 26, 34, 108, 110. 



Gerris orba, 108. 



Gerris remigis, 32, 34, 108, 116. 



Gerris robusta, 108. 



Gesner, 13. 



Giant water bugs (see Belostomatidm) . 



Gonatonzygon, 244. 



Gregarine, 32. 



Gyrinidw, 181. 



H. 



Hagemann, 16, 237. 

 Halobates, 30, 107, 116. 

 Halobates micans, 116, 120. 

 Halobates sericevs, 116, 120. 

 Harvey, 142. 



HebridcTB, 8, 11, 12, 29, 33, 39, 82. 

 Hebrido?, Biology of, 88-91. 

 Hebridae, Key to genera, 82. 

 Hebrus, 29, 82, 85. 

 Hebrus burmcistori, 85. 

 Hebrus concivnus, 86, 87. 

 Hebrus consolidus, 86. 

 Hebrus sohrinus, 86, 87. 

 Hebrus, Key to species, 86. 

 Heidemann, 92. 

 Heterotrichs, 244, 247. 

 Hewitt, 157. 



Hibernation of Notonectids, 32. 

 Holmes, 160, 161. 

 I Hoppe, 43, 180. 

 Howard, L. O., 148. 

 Hydrobatidaa (see Gerridae). 

 Hydrodictyon, 101. 

 Hydrometra, 26, 39, 41, 91, 101. 

 Hydrometra australis, 91, 92. 

 Hydrometra, Key to species, 91. 

 Hydrometra martini, 34, 91, 92. 

 Hydrometra, parasite of, 32. 

 H'ydrometridfB, 8, 11, 12, 25, 26, 29, 91. 

 Hydrometrida:', Biology of, 92, 99. 

 Hydrachnids, 31, 182, 231. 

 Hydrophilidte, 159. 



I. 



loscytes, 56, 76. 



loscytus politus, 76. 



loscytus politus var. flavicoslo, 77. 



Jassids, 117. 

 Johannsen, 181. 

 Juncus, 34. 



