282 



Diatoms, 190, 201, 258. 

 Dicranomyia, 197. 

 Dicranota, 195, 196, 198. 

 Diptera, 150. 154, 155, 156, 157, 158. 

 161, 162,163,164,184,273. 

 key to families: larva and pu- 

 P8B, 186. 

 Dixa midges, 187. 

 Dixidee, 187, 188. 

 Dolichopodidse, 267. 

 Dragon-flies, 163. 



EmpididaB, 267. 

 Ephemerida, 159, 163. 

 Erioptera, 196, 197. 



graphica, 197. 



sp. (a), 197,279. 

 Eristalis, 239. 



False crane-flies, 187. 



Fishes, 157, 158. 



Flies, 150, 157, 163. See Diptera. 



Gammarus, 156. 

 Geranomyia, 197, 200. 



canadensis, 200. 



rostrata, 200. 

 Gnats, 187. See Chironomidee. 

 Gnophomyia, 196. 

 Gonomyia, 197. 

 Green- head, 237. 

 Gyrinidse, 155, 156, 163. 



Hadronotus, 276. 



Haliplids, 155. 



Hemiptera, 163. See water-bugs. 



Heteroeeriilfie, 156. 



Homophysa, 174, 175. 



Horse-flies, 150, 155, 157. 158, 160, 



187, 220. See Tabanidffl. 

 HydrobatideB, 155. 

 Hydrocampa, 157,165,166,167.174:, 



175, 179. 

 ekthlipsis, 176. 

 formosalis, 176. 

 genuinalis, 176. 

 gyralis, 175, 

 icciusalis, 166, 175, 176. 

 obUteralis, 166, 168, 174, 175, 



176, 179, 270 278. 



Hydrocampa — Continued. 

 peremptalis, 180. 

 proprialis, 176. 

 Hydrocampinee, 164, 168, 271. See 



aquatic caterpillars. 

 Hymenoptera, 150, 245, 270. 



parasitic, 157, 158. 178, 181, 245, 

 250, 253, 257, 264, 270. 

 Ichneumonidae, 270, 277. 

 Insects, key to orders, 162. 

 larvae, 163. 

 nymphs, 163. 

 pupae, 164. 

 Isotoma, 156. 



Leeches, 155, 156. 



Lemna, trisulca, 168, 177, 271. 



Lemnaceae, 271. 



Lepidoptera, 150, 163, 164, 165,271. 



key to larvae, 165. 

 pupffi 166. 

 Leptidae, 158, 1S8, 189, 267. 



? larvae, 26S. 



?sp. (a), 268. 



?sp., (b), 269. 



?sp., (c),270. 

 Limnobiinae, 195, 196, 197, 206. 

 Llmnobiini, 197. 

 Limnophila, 197, 200, 228, 239, 241. 



luteipennis, 200, 205, 279. 



sp. (a), 204. 

 Loxotropu ruflcornis, 271. 



May-flies, 163. See Ephemerida. 

 Megilla maculata, 157, 254. 

 Midges, 187. See Chironomidae. 

 Mollusks, 155. 



Mosquitoes, 156, 187. See Oulicldee. 

 Moth-flies, 186. See Psychodidee. 

 Muscids, 239. 



Nelumbo, 152, 168, 180. 



lutea, 181. 

 Nematocera, 186, 188. 

 Nemotelus, 249, 266. 



unicolor, 266. 

 Neuroptera, 163, 164. 

 Neuropteroids, 155. 

 Noctuidae, 164, 165, 166. 



