550 



INDEX TO GENERA. 



Scolopax 355 



Stenogyra....l48, 153, 187, 241, 251 



Stenopus 147 



Stenotrema 154, 204 



Stephanoceros 121 



Scops 344,480 



Sciurus 349 



Setophaga 352 



Sialia 351 



Simpulopsus 148 



Sitta 347 



Smerinthus 54 



Solanum 18 



Solenodon 445 



Sparvius 110, 470 



Strix 344 



Strobila 154,200 



Strophia 148, 154, 190 



Sturnella 348 



Spiraxis 146 



Spizaetus 89 



Spizella 351 



Sphenodon 404 



Sphinx 35 



Sphyropicus 347 



Sterna 357 



Sternus 351 



Stibadium 425 



Strebelia 146 



Strepsilas 355 



Strepstostele 146 



Streptostyla 146 



Streptaxis 140 



Stypolophus 21, 444, 448 



Succinea 149, 155, 230, 242 



Sula 357 



Syneda 435 



Syrnium 344, 480 



Synoplotherium 23, 445 



Tachea 155, 220 



Tachypetes 357 



Tacbytriorcbis 90 



Taenia 10 



Tseniocampa 432 



Tseniosa 432 



Tantalus 340, 354 



Tapinostola 432 



Tarache 65, 69, 426 



Tebennophorus 153, 181, 237 



Tennentia 147 



Terebratula 36 



Testacella 146 



Tetrao 349 



Textilaria 74 



Thalpocares 434 



Thomomys 130 272 



Tbryothorus 351 



Tliyreus 25 



Tillandsia 466 



Tinea 37 



Tomigerus 148 



Tomitherium 256 



Tornatella 148 



Totanus 354 



Trichocephalus 440 



Tringa 355 



Tringoides 355 



Trionyx 9 



Triottopsis 154, 206 



Trochilium 32 



Trochilns 347 



Troglodytes 351 . 



Turdus. 348 



Typothorax 265 



Tyrannus 348 



Uintatherium 73 



Unio 255 



Urocyclus 147 



Urubitinga 89 



Urubitornis 89 



Utetbeisa 54, 46 



Vallonia 155, 213 



Vanessa 24, 33 



Veronicella 148, 156, 232, 242 



Vertigo 148, 154, 189 



Vibrio 263 



Vireo 348 



Vitis 28 



Vitrina..l47, 153, 171, 236, 241, 336 



Vitrinoconus 147 



Vitrinoidea 147 



Vitrinopsis 147 



Volviceramus 467 



Vultur 271, 339, 344 



Xantbia 66 



Xantbouyx 148 



Yucca 36 



Zcnaidura 348 



Zoiiites..l41, 147, 153, 161, 234, 



242, 835 



Zonotricbia 351 



Zospeum 148 



