284 THOMOMYS. 



704. Thomomys clusius Coues. 



Thomomys clusius Coues, Proc. Acad. Nat. Scien. Phil., 1875, 

 p. 138. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 1901, 

 p. 229. Zool. Ser. 

 COUES' POCKET GOPHER. 



Type locality. Bridget Pass, Sweetwater County, Wyoming. 

 Geogr. Distr. Uncompahgre Reservation, Utah, through south- 

 western Wyoming into southern and central Idaho. 



a. Tlniiiiaiii i/x cliixiiix urinx .Merriam. 



Thomomys clusius ocius Merr., Proc. Biol. Soc. Wash., xiv, 1901, 



p. 114. 

 SWIFT POCKET GOPHER. 



Type locality. Fort Bridger, Uinta County, Wyoming. 



Geogr. Distr. Wyoming. Range unknown. 



Genl. Char. Similar to T. clusius; interparietal and bullae larger. 



Color. Above pale buffy; cheeks pale buflfy gray; sides buffy 

 white ; under parts and feet white. 



Measurements. Total length, 204 ; tail vertebrae, 197 ; hind foot, 25. 



705. Thomomys idahoensis Merriam. 



Thomomys idahoensis Merr., Proc. Biol. Soc. Wash., xiv, 1901 , p. 1 14. 

 IDAHO POCKET GOPHER. 



Type locality. Birch Creek, Fremont County, Idaho. 



Geogr. Distr. Idaho. Range unknown. 



Genl. Char. Size small; similar to T. clusius. Skull: bullag large; 

 zygomata narrow; nasals long, slender. 



Color. Above grayish buff washed with buffy fulvous; under 

 parts, tail, and feet buffy white. 



Measurements. Total length, 179; tail vertebras, 47 ; hind foot, 23. 



706. Thomomys pygmasus Merriam. 



Thomomys pygmaus Merr., Proc. Biol. Soc. Wash., xiv, 1901, 



p. 115. 

 PYGMY POCKET GOPHER. 



Type locality. Montpelier Creek, Bear County, Idaho. Altitude, 

 6,700 feet. 



( -cogr. Distr. Idaho. Range unknown. 



Genl. Char. Size small. Skull similar to T. idahoensis, smaller; 

 interparietal transversely oval ; nasals short, emarginate posteriorly ; 

 bulke small. 



Color. Above dark rufous brown; beneath buffy fulvous; feet 

 whitish. 



Measurements. Total length, 177 ; tail vertebrae, 46; hind foot, 22. 



