LIST OF SPECIES. XXXIX 



Tage. 



101. Spermophilus franklini, Rich. Gray Gopher. Northern Illinois and Wisconsin, 



and to Minnesota and the Saskatchewan 314 



102. Spermophilus tereticauda, Baird, (n. s.) Round-Tailed Spermophile. Fort 



Yuma, Cal 315 



103. Spermophilus tridecem-lineatus, Aud. & Bach. Striped Gopher : Prairie Squir 

 rel. Eastern Michigan to the plains of the Missouri, and south to 

 Red River, Arkansas, a:.d Fort Thorn, N. M 316 



104. Spermophilus mexicaims, Wagner. Mexican Ground Squirrel. Rio Grande of 



Texas and the Pecos, and south into Mexico 319 



105. Spermophilus spilosoma, Bennett. Sonora Ground Squirrel. Fort Staunton, N. 



M. and El Paso, to Chihuahua, and west to the Gulf of California.... 321 



106. Spermophilus parryi, Rich. Parry's Marmot. Shores and islands of Arctic seas ; 



island of Arikamtchitchi, on the Asiatic side of Behring's Straits 323 



107. Spermophilus richardsonii. Yellow Gopher. Sault St. Marie, Mich., and west 



to the Rocky Mountains north of Upper Missouri 325 







108. Spermophilus townsendii, Bach. Townsend's Spermophile. Rocky Mountains 



to the north 326 



26. CYNOMYS, Raf. 329 



109. Cynomys ludovicianus. Prairie Dog. Milk river and Upper Missouri ; west 

 towards the Rocky Mountains ; south to Red River ; southwest to the 

 Upper Rio Grande, and a short distance into Sonora? 331 



110. Cynomys gunnisonii, Baird (n. s.) Short-Tailed Prairie Dog. Coochetope 



Pass to Lodge Pole Creek, in or near the Rocky Mountains 335 



27. ARCTOMYS, Schreher. 348 



111. Arctomys monax, Gmelin. Woodchuck ; Ground Hog. Massachusetts to Wis 

 consin and Canada ; south to Virginia. (To South Carolina, Aud. 

 & Bach.) 339 



112. Arctomys flaviventer, Bachman. Yellow-Footed Marmot. Black Hills, Neb.... 343 



28. APLODONTIA, Rich. 350 



113. Aplodontia leporina, Rich. Sewellel; Showt'l. Puget's Sound 353 



29. CASTOR, Linn. 355 



114, Castor canadensis, Kuhl. American Beaver. Throughout the entire area of 



North America 355 



