284 



Stratdomyia, 156, 157, 247, 248, 249, 

 254. 



aplcula, 249. 



dlscalis, 249. 



marginalis, 249. 



norma, 249, 253, 271, 280. 



obesa, 249. 



quaternaria, 249. 

 Stratiomyiidee, 150, 155, 157, 161, 184, 

 188, 189, 247. 



key to genera, 248. 

 Stratiomyiinfe, 248. 

 Surface beetles, 155. See Gyrinldre. 



bugs, 155. 

 Symplecta, 196, 197, 199. 



punctipennis, 199, 279. 



Tabanidse, 150, 157, 184, 187. 18i, 199, 



220, 230, 235, 241. See 



horseflies. 

 key to genera : eggs, 225. 



larvae, 226. 



pupee, 226. 

 Tabanus, 224, 225, 226, 227, 230, 233. 

 key to species : larv83, 230. 



pupse, 232. 

 abdominal! s, 233. 

 americanus. 247. 

 atratus, 11)9, 224, 231, 232, 239, 



241, 242, 272, 275, 280. 

 atratus group, 224, 225, 231, 232, 

 bicolor, 232. 

 cerastes, 233. 

 co&talis 2 51, 232, 236. 

 cymatophorus, 233. 

 epistates, 232. 

 exul, 233. 

 fulvulup, 239. 

 giganteus, 233, 247. 

 lasiophthalmus, 232. 

 lincola, 23 i, 231, 232, 235, 279. 

 lineola group, 224, 225, 231, 232, 



239. 

 nigrescens, 231, 232. 235, 238. 

 reinwardtii. 233. 

 sagas, 238. 

 ep. (a), 2 ;i, 234. 

 sp. (b), 231, 241, 280. 



Tabanus — Continued. 



stygius, 231, 232, 238, 239, 241^ 

 247, 280. 



sulcifrons, 234. 



trimaculatus, 234. 



trispilus, 232. 



turbidus, 233 



venustus, 233. 

 Telenoraus, 275, 276. 



laricis, 275, 276. 



othus 275, 276. 



tabani 275, 276. 

 Therioplectes, 232. 

 Thysanura, 162, 163. 

 Tipula, 195, 197, 206. 



blcornis, 208. 



eluta, 208, 210, 215, 217, 218^ 

 279. 

 Tipulidffi, 150, 157, 158, 159, 184, 186» 

 188. 190, 195, 239. 



key to genera : larvse, 196. 

 Tipulinee, 196, 197, 206. 



key to species : larvsB. 208. 



specific characters: pupse, 210i 



sp. (a), 209, 214. 



sp. (b), 209, 215, 279. 



sp. (c), 209. 



sp. (d), 209. 



sp. (e), 210, 216, 279. 



sp. (0,210,219. 

 Top-minnows, 155. 

 Trichoptera. 163, 164. See case-flies.. 

 Tubifexrivulorum, 195. 



Univalves, operculate, 157. 

 Vallisneria, 152. 

 spiralis, 167. 

 Veliidee, 155. 



Water beetles, 155, 156, 160, 163. 



bugs, 155, 156, 161, 163. 



lily, 179. 



snails, 221. 



striders, 155. 

 Willow, 153, 154, 190. 

 Wi:eat, 2(ft). 

 Woi-m, 195. 



Xylophagidfe, 267. 

 Xylophagus, 267. 



