X BULLETIN 17 8, UNITED STATES NATIONAL MUSEUM 



Order Rodentia: Rodents — Continued. 



Family Cricetidae: Cricetine rats and mice — Continued. Pag* 



Genus Scolinomys Thomas 350 



Genus Sigmodon Say and Ord 350 



Genus Synaptomys Baird 354 



Genus Tatera Lataste 356 



Genus Teanopus Merriam 356 



Genus Thallomyscus Thomas 356 



Genus Thomasomys Coues 357 



Genus Tylomys Peters 357 



Genus Xenomys Merriam 357 



Genus Zygodontomys J. A. Allen 358 



Family Cuniculidae: Spotted cavies 358 



Genus Cunictdus Brisson 358 



Family Dasyproctidae: Agoutis 358 



Genus Dasyprocta Illiger 358 



Family Dipodidae: Jerboas 359 



Genus Allaclaga F. Cuvier 359 



Genus Euchoreuies W. L. Sclater 359 



Family Echimyidae: Spiny rats ._ 360 



Genus Aphaetreus Miller 360 



Genus Boromys Miller 360 



Genus Brotomys Miller 360 



Genus Capromys Desmarest 360 



Genus Ctenomys Blainville 361 



Genus Diplomys Thomas 361 



Genus Echimys Cuvier 362 



Genus Hexolobodon Miller 3G2 



Genus Hoplomys J. A. Allen 362 



Genus I.wlobodon J. A. Allen 362 



Genus Plagiodonlia F. Cuvier 362 



Gonus Proechimys J. A. Allen 363 



Genus Quemisia Miller 363 



Family Erethizontidae: American porcupines 364 



Genus Erelhizon F. Cuvier 364 



Family Geomyidac: Pocket gophers 364 



Genus Craio^sowys Merriam 364 



Genus Geomys RaBnesque 368 



Genus Heterogeojnys Merriam 371 



Genus Macrogeomys Merriam 372 



Genus Orthogeomys Merriam 372 



Genus Pappogeomys Merriam 374 



Genus Platygeomys Merriam 375 



Genus Thomomys Wied 377 



Genus Zygogeomys Merriam 403 



Family Graphiiiridae: African dormice 404 



Genus Claviglis Jentink 404 



Family Heteromyidae: Kangaroo rats, pocket mice 405 



Genus Dipodomys Gray 405 



Genus Ileteromys Desmarest 416 



Genus Liomys Merriam 418 



Genus Microdipodops Merriam 421 



Genus Perogna</iw« Wied 422 



