INDEX TO GENERA. 



46'? 



Pontoporia 267 



Popiilus 353 



Porpliyrasi)is 76 



Potamopyrgus 286 



Potentilla 289 



Portheus 337 



Prasocuris 51 



Pristomerus 388 



Procanielus 420 



Prouuba 414 



Pro'tlieca 384 



Protocamelus 15 



Protoliippns 420 



Pselaphodes 327 



Psenocerus 336 



Psiloptera 84 



Psilothrix 333 



Psylliodes 76 



Pterostichus 303, 312 



Pnpina 233 



Pygopterus 418 



Pyrgula 286 



Quercus 851, 354, 370 



Eanmiculns 276, 289 



Rliipidandrus 335 



Rhombodera 322 



Rhus 800 



Rhynchonella 195 



Rissoa 215 



Rissoina 209 



Rissopsis 228 



Rudbeckia 800 



Sagda 249 



Salix 363 



Salmo 258 



Samocephalus 339 



Saxinis 28 



Saturnia 281 



Sayornis 292 



Sciiizostedion 415 



Sciurus 101 



Scraptia 335 



Sintectus 827 



Sirenia 266 



Sisyrinchiura 205 



Smerinthus 282 



Sphinx 282 



Stagetus 334 



Stenaspis 836 



Stenispa 80 



Stenogyra 247 



Stenopus 246 



Stenotrema 241 



Stereocerus 328 



Stereopalpus 335 



Stoastoma 253 



Succinea 245, 251, 286 



Suphis ^. . . 326 



Sus 207 



Syueta 24 



Systena 68 



Tachyporus 327 



Tachyta 326 



Ta]a?opora 336 



Talinuin 364 



Taphrocerus 96 



Tarsosteuus 334 



Tautoga 15 



Taxodium 363 



Tecoma 101 



Telephorus 333 



Tenebrio 335 



Terebratella 183 



Terebratula 178 



Terebiatuliua 179 



Thccidium 195 



Theronia 395 



Thorictus 338 



Thyreodon 375 



Tilius 334 



Timarcha 46 



Titanotherium 11 



Tmesiphorus 334 



Tomitherium 419 



Toposcopus 335 



Toreuia 101 



Torula 261 



Trachykele 87 



Trechiis 825 



Trichothorax 323 



Trifolium 354 



Trihabda 56 



Trionyx 277 



Troglodytes 293 



Trogns 131 



Tryonia 286 



Tryphon 891 



Tulotoma 352 



Typophorus 38 



Uintatherium 10, 103 



Unio 422 



Urodera 28 



Vancheria 420 



Verouicella 247 



Vireo 854 



Vitrina 240 



Vitrinolla 213 



Volvaria 217 



