WESTERN POCKET GOPEER 



parts (summer) dull cmnamon to light tawny, blackish on 

 nose and about ear; feet whitish; tail buffy gray; underparts 

 pale cmnamon. Wmter pelage with more gray Total 

 length, males 8.8 inches, females, 8.0; tail verteb/s, males 

 2.7 inches, females, 2.6; hind foot, males, 1.24 inches' 

 females, i 16. Found only in the Animas Valley, south- 

 west New Mexico. 



Sierra Blanca Pocket Oo^her. —Thomomys haileyi Merriam 

 Upperparts (winter pelage only is known) dull ochraceous 

 tawny to buffy fulvous, dusky on nose and about ear- feet 

 dirty whitish; tail buffy; underparts creamy white to' pale 

 salmon. Total length, males, 8.6 inches, females 8 S' tail 

 vertebrae males, 2.6 inches, females, 2.8; hind foit males 

 1.24 inches, females, 1.16. Found in "Sierra Blanca' 

 western Texas, north to Tularosa, N. Mex." (Bailey) 



Lachuguilla Pocket Qo^her. —Thomomys lachugmUa (Bailey) 

 bmall m size, resembling aureus in superficial appearance* 

 but paler. Upperparts dull ochraceous tawny to grayish 

 buff, dusky on nose and about ear; feet whitish; underparts 

 pale cinnamon to dirty white. Total length, males 8 6 

 inches, females, 8.1 ; tail vertebras, males, 2.6 inches fem'ales 

 2.4; hmd foot, males, 1.16 inches, females, 1.04. iPound in 

 And Lower Sonoran mesas in extreme western Texas and 

 southern New Mexico, south to Casas Grandes, Chihua- 

 hua. (Bailey) 



Umbrinus Group 



Little Gray Pocket Oovher. —Thomomys perditus Merriam 

 bmall m size; buffy gray to pale tawny in color. Upperparts 

 dark buffy gray to pale dull tawny; sides brighter than 

 back; dusky on nose, lips, and about ears; feet buffy to 

 creamy white; underparts like feet. Total length males 7 7 

 inches, females, 7.2; tail vertebra, males, 2.3 inches, females 

 2.2; hmd foot, males, 1.06 inches, females, .98. Found iii 

 -bastem Coahuila and western Nuevo Leon, north to Rock 

 Springs and Castle Mountains, western Texas." (Bailey) 



Talpoides Group 



Characterized by mammas in six pairs or more (inguinal, 

 2-2; abdominal, 2-2; pectoral, 2-2). 



Saskatchewan Pocket Oov^er. —Thomomys talpoides talpoides 

 (Richardson). 

 "Size medium; ears prominent and pointed; claws slender- 

 color dull and dark gray." (Bailey) Upperparts (summer)' 

 dull grayish brown; darker, almost black, on nose and about 

 ear; feet whitish; tail whitish, often only white-tipped- 

 underparts varying from buffy to dirty whitish gray pure 

 white on chm and sometimes on throat and breast. Winter 

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