WESTERN POCKET GOPHER 



grayer. Total length, males, 9.0 inches, females, 8.2; tail 

 vertebras, males, 2.8 inches, females, 2.6; hind foot, males, 

 1.24 inches, females, 1.12. Found in "Western Wyoming^ 

 southeastern Idaho, and northern Utah." (Bailey) 



Dalles Pocket Gopher. — Thomomys quadratus quadratus Mer- 

 riam. 

 Smaller and brighter colored th^nfossor. Upperparts (sum- 

 mer) light russet; blackish on nose and about ear; feet whit- 

 ish; tail brownish, dirty whitish at tip; underparts dark 

 buff, slate-colored underfur showing through. Winter 

 pelage grayer. Total length, males, 8.2 inches, females, 

 7.8; tail vertebrae, males, 2.6 inches, females, 2.5; hind foot, 

 males, 1.08 inches, females, 1.06. Found on "Plains of 

 eastern and central Oregon, northeastern California, and 

 north v/estern Nevada." (Bailey) 



Fisher Pocket Gopher. — TJiomomys quadratus fisheri (Mer- 

 riam). 

 Smaller than typical quadratus, color paler, tail shorter. 

 Upperparts (summer) buffy gray, with dull russet tinge on 

 dorsal area; slaty on nose, blackish about ear; whitish on 

 feet, chin, underside of tail; tail above gray; underparts 

 buffy. Winter pelage very similar to summer pelage, but 

 slightly grayer. Total length, males and females, j.j 

 inches; tail vertebras, 2.3 inches; hind foot, i.o inches. 

 Found in "Northern, central, and western Nevada; west in 

 Cahfomia to Sierra Valley and Mona Lake." (Bailey) 



Douglasii Group 



Characterized by ears large and rounded at tips; mammae 

 in four pairs (inguinal, 2-2; pectoral, 2-2). 



Douglas Pocket Gopher or Columbia Sand Rat. — Thomomys 

 douglasii douglasii (Richardson). 

 "Size medium; claws stout; ears medium with rounded tips ; 

 color nearly uniform dull hazel without dark ear patch." 

 Upperparts (summer) dull hazel; sides slightly paler; gray 

 on nose; soiled whitish on feet and tail; underparts more 

 ochraceous than upperparts. Total length; males, 8.6 

 inches, females, 8.0; tail vertebrse, males, 2.6 inches, females, 

 2.3; hind foot, males. 1.2 inches, females, 1.14. Found along 

 the Columbia River near Vancouver, Washington. 



Oregon Pocket Gopher. — Thomomys douglasii oregonus Mer- 

 riam. 

 Resembling typical douglasii in size but color brighter and 

 ears smaller. Upperparts (summer) clear bright hazel, 

 dusky on nose and cheeks and blackish about ears ; under- 

 parts paler, with more of an ochraceous tone. Total length, 

 males, 8.8 inches, females, 8.2; tail vertebrse, males, 2.8 

 inches, females, 2.6; hind foot, males, 1.20 inches, females, 

 1. 13. Found about Oregon City, Oregon. 



283 



