FIELD BOOK OF MAMMALS 



cheek, and about ears; underparts pale tawny. Winter 

 pelage like summer but slightly duller. Total length, males, 

 9.6 inches, females, 9.0; tail vertebrae, males, 3.0 inches, 

 females, 2.7; hind foot, males, 1.30 inches, females, 1.25. 

 Found in "Upper Rio Grande and San Luis Valleys in 

 northern New Mexico and southern Colorado." (Bailey) 



Desert Pocket Gopher. — Thomomys fulvus desertorum (Mer- 

 riam). 

 Somewhat resembling typical fulvus but noticeably smaller 

 and brighter colored ; sexes about equal in size. Upperparts 

 (summer) bright orange- tawny to orange-cinnamon; dusky 

 on nose, cheeks, and about ears; feet and tail dirty white to 

 buffy; underparts creamy white or with light cinnamon 

 wash. Winter pelage with more yellow, duller in tone. 

 Total length, males and females, 7.8 inches; tail vertebree, 

 2.5 inches; hind foot, 1.04 inches. Found in "Detrital and 

 Big Sandy Valleys, northwestern Arizona; east in the Grand 

 Canyon to Prospect Valley." (Bailey) 



Mountain-top Pocket Gopher. — Thomomys fulvus intermedius 

 M earns. 

 Resembling typical fulvus but smaller and with well-defined 

 black dorsal band. Upperparts (summer) dark tawny with 

 darker dorsal region, brownish black to black, occasionally 

 forming a conspicuous black band from nose to tail; feet 

 dirty white; tail brown, tipped with whitish; underparts 

 pale tawny. Total length, males and females, 8.0 inches; 

 tail vertebrae, 2.5 inches ; hind foot, i .0 inches. Found along 

 "Upper slopes of mountains in southeastern Arizona and 

 extreme southwestern New Mexico." (Bailey) 



Davis Mountain Pocket Gopher. — Thomomys fulvus texensis 

 Bailey. 

 Smaller than typical fulvus, lighter in color. Upperparts 

 (summer) tawny gray; blackish on nose, cheeks, and about 

 ear, gray on feet and lips; underparts tawny, brighter than 

 upperparts. Winter pelage darker and less bright than sum- 

 mer. Found only in the Davis Mountains, Texas (5,500 

 feet altitude). 



Toltec Pocket Gopher. — Thomomys fulvus toltecus (Allen), 

 Resembling typical fulvus in size but paler and grayer. 

 Upperparts (summer) dull ochraceous tawny, brownish on 

 nose, blackish about ear ; feet whitish ; tail buffy gray ; under- 

 parts like upperparts but lighter in shade. Winter pelage 

 grayer on upperparts and with dusky along dorsal region. 

 Total length, males, 8.8 inches, females, 8.2; tail vertebrae, 

 males, 2.9 inches, females, 2.6; hind foot, males, 1.26 inches, 

 females, 1.16. Found in "Lower Sonoran valleys and 

 deserts of southeastern Arizona, southwestern New Mexico, 

 and adjacent parts of Chihuahua and Sonora, south to 

 Colonia Juarez, Chihuahua." (Bailey) 



Meams Pocket Gopher. — Thomomys mearnsi Bailey, 



Smaller than typical /w/i;w5 and less dusky in color. Upper- 



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