FIELD BOOK OF MAMMALS 



white; tail indistinctly bicolor, dark gray above, light gray 

 below. Total length, 6 inches; tail vertebrae, 1.8 inches; 

 hind foot, .72 inch. Found in "The Blue Mountains of 

 Oregon, mountains of northern Idaho, and northward into 

 British Columbia to Cariboo Lake." (Bailey) 



Mogollon Red-backed Mouse. — Evotomys limitis Bailey. 

 Larger than galei, colors duller and grayer. Upperparts 

 (summer) dark chestnut, with gray sides. Winter pelage 

 grayer. Total length, 6 inches; tail vertebrae, 1,7 inches; 

 hind foot, .8 inch. Found in the Mogollon Mountains of 

 New Mexico. 



Short-tailed Red-backed Mouse. — Evotomys hrevicaudus 

 (Merriam). 

 Differing from gapperi in larger hind foot and shorter tail; 

 paler in summer pelage. Total length, 5 inches; tail 

 vertebrae, 1.25 inches; hind foot, .76 inch. Found in 

 "Boreal cap of Black Hills in South Dakota." (Bailey) 



Carolina Red-backed Mouse. — Evotomys carolinensis Mer- 

 riam. 

 Size large; tail long; color dark and rich. Upperparts 

 (summer) dark chestnut, not sharply defined from brownish 

 sides, sprinkled with black; ears dusky; tail faintly bicolor, 

 blackish above, grayish below; underparts white to buffy. 

 Winter pelage paler and brighter. Total length, 6 inches ; 

 tail vertebrae, 1.8 inches; hind foot, .8 inch. Found in 

 "Boreal parts of Allegheny Mountains of North Carolina, 

 Tennessee, and West Virginia [also Virginia and Maryland]." 

 (Miller) 



Ungava Red-backed Mouse. — Evotomys ungava Bailey. 



"Size about as in gapperi; tail and feet slender; ears very 

 small, not projecting beyond fur; colors dull; tail bicolor, 

 . . . Dorsal area not sharply defined, dull brownish chest- 

 nut; sides and face buffy gray, finely lined with blackish 

 hairs; belly dark plumbeous, heavily washed wi*h buffy." 

 Total length, 5.4 inches; tail vertebrae, 1.6 inches; hind 

 foot, .76 inch. Found about Fort Chimo, Ungava, Canada. 



Idaho Red-backed Mouse. — Evotomys idahoensis Merriam. 

 Larger than gapperi, with longer tail and grayer sides. 

 Upperparts with well-defined, pale hazel stripe; sides clear 

 ashy gray ; feet gray ; tail bicolor, blackish and gray ; under- 

 parts whitish. Total length, 6 inches; tail vertebrae, 1.6 

 inches; hind foot, .8 inch. Found in "Mountains of south 

 central Idaho, between Snake River and the Sahnon." 

 (Bailey) 



Cascade Red-backed Mouse. — Evotomys mazama Merriam. 

 "Large, long- tailed, and bright- colored; ears not rufous; 

 . . . side glands conspicuous in all of the adult males." 

 (Bailey) Upperparts with rufous or hazel dorsal band 

 blending into buffy gray of face and sides; grayish spot 

 over lateral glands; tail sharply bicolor. Total length, 6.3 

 inches; tail vertebra, 2 inches; hind foot, .75 inch. Found 



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