FIELD BOOK OF MAMMALS 



Northwestern Red-backed Mouse. — Evotomys caurinus 

 Bailey. 

 Size small; colors dark; tail short. Upperparts (summer) 

 dark rich chestnut, sprinkled with black; dorsal band very- 

 distinct; sides sepia gray, with buffy tinge; face dark gray; 

 ears dusky; tail bicolor, above like back, below buffy; 

 underparts whitish to buffy. Winter pelage brighter above, 

 sides clearer gray. Total length, 5.4 inches; tail vertebras, 

 1.45 inches; hind foot, .72 inch. Found in the vicinity of 

 Malaspina Inlet, British Columbia. 



Wrangell Island Red-backed Mouse. — Evotomys wrangeli 

 Bailey. 

 Large; dull colored; short-tailed; thick-furred. Upper- 

 parts dull dark chestnut; sides sepia gray; feet dusky; tail 

 bicolor; underparts whitish. Total length, 5.9 inches; 

 tail vertebrse, 1.5 inches; hind foot, .8 inch. Found on 

 Wrangell and Revillagigedo Islands, southern Alaska. 



Dark-colored Red-backed Mouse. — Evotomys phcBus Swarth. 

 Size rather large; tail relatively long. Upperparts dark 

 brown, dorsal band not very distinctly outlined; sides and 

 face yellowish brown; tail bicolor, above like back, below 

 yellowish; underparts gray. Total length, 6.2 inches; 

 tail vertebras, 2 inches; hind foot, .8 inch. Found in 

 southeastern Alaska. 



Dawson Red-backed Mouse. — Evotomys dawsoni dawsoni 

 Merriam. 

 A bright-colored form with prominent ears. Upperparts 

 bright rusty red, lightly sprinkled with black, sharply 

 defined from buffy sides; tail bicolor; underparts pale 

 buffy. Total length, 5.8 inches; tail vertebras, 1.3 inches; 

 hind foot, .8 inch. Found "From Finlayson River and 

 Fort Liard west to Yakutat and Juneau, and north along 

 the coast to Norton vSound." (Miller) 



Island Red-backed Mouse. — Evotomys dawsoni insularis 

 Heller. 

 Upperparts rusty rufous ; sides yellowish ; tail bicolor, above 

 like back, below yellowish brown; underparts grayish. 

 Total length, 5.8 inches; tail vertebras, 1.3 inches; hind 

 foot, .78 inch. Found on Hawkins Island, Prince William 

 Sound, Alaska. 



Orca Red-backed Mouse. — Evotomys orca Merriam. 



Size medium; colors dark. Upperparts dark chestnut to 

 hazel; sides yellowish, mixed with black; face dark; tail 

 above, dusky, below, buffy; underparts deep buffy. Total 

 length, 5.6 inches; tail vertebrae, 1.3 inches; hind foot, .8 

 inch. Found in the vicinity of Orca, Prince William 

 Sound, Alaska. 



******* 

 Red-backed Mice live in cool, damp localities and are 



essentially forest dwellers. They are usually distinguished 



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