WESTERN POCKET GOPHER 



La Puerta Pocket Gopher. — Thomomys bottce puertce (Grinnell). 

 Resembling nigricans except for paler color. Upperparts 

 (summer) pale ochraceous tawny, somewhat darker along 

 dorsal region; underparts pale cinnamon. Winter pelage 

 darker and grayer. Total length, males, 8.1 inches; tail 

 vertebrae, 3.2 inches; hind foot, i.i inches. Found in "La 

 Puerta and San Fehpe Valleys, Cal." (Bailey) 



San Bernardino Mountain Pocket Gopher. — Thomomys altival- 

 lis Rhoads. 

 A large mountain form of the hottcE group. Upperparts dull 

 ochraceous, with less black than in typical bottce, but darker 

 dorsal area faintly indicated; blackish on nose, cheeks, and 

 about ear; underparts soiled whitish to buffy. Summer 

 pelage a brighter ochraceous than winter. Total length, 

 males, 10.8 inches, females, 9; tail vertebra, males, 3.1 

 inches, females, 2.6; hind foot, males, 1.4 inches, females, 

 1.2. Found in "San Bernardino Mountains, Cal." (Bailey) 



Alpinus Group 



Characterized by dark coloration; mamm^ in four pairs 

 (inguinal, 2-2; pectoral, 2-2). 



Mt. Whitney Pocket Gopher. — Thomomys alpinus alpinus 

 Merriam. 

 Ears large and conspicuous (for a Pocket Gopher); sexes 

 about same size. Upperparts dull dark ochraceous, black- 

 ish along median dorsal region and on nose; feet whitish; 

 tail whitish for last two-thirds of its length; underparts 

 paler than upperparts, throat white. Winter pelage with 

 more yellow and less ochraceous. Total length, males and 

 females, 8.9 inches; tail vertebrae, 2.5 inches; hind foot, 1.2 

 inches. Found in "Southern part of the Sierra Nevada, 

 Cal., at altitudes between 6,000 and 11,000 feet, frorn 

 Mount Whitney south to Siretta Meadows." (Bailey) 



Yosemite Pocket Gopher. — Thomomys alpinus awahnee Mer- 

 riam. 

 Smaller than typical alpinus. Upperparts (summer) dull 

 dark ochraceous ; underparts pale buffy to ochraceous, often 

 with irregular white spots and marks of white on abdomen. 

 Winter pelage darker, ochraceous tinged with dusky. Total 

 length, males, 8.8 inches, females, 7.8; tail vertebra, males, 

 3.0 inches, females, 2.2; hind foot, males, i.i inches, females, 

 1.04. Found along "Western slopes of the Sierra Nevada, 

 Cal., from Sequoia, Tuolumne County, south to Tehachapi 

 Peak." (Bailey) 



San Gabriel Pocket Gopher. — Thomomys neglectus Bailey. 

 Resembling altivallis in external appearance but differen- 

 tiated by cranial characters. Upperparts (summer) dull 

 ochraceous, heavily sprinkled with black-tipped hairs to 

 give general impression of dark gray; underparts dull buffy. 



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