The American Voles of the Genus Evotomys. 131 



Color [type specimen skinned out of alcohol]. Dorsal area not sharply 

 denned, dull brownish chestnut ; sides and face buffy gray, finely lined 

 with blackish hairs ; belly dark plumbeous, heavily washed with buffy ; 

 ears tipped with color of back ; feet dusky gray ; tail indistinctly bicolor, 

 soiled buffy below, brownish above; sides of nose whitish ; a small white 

 spot under lower lip. 



Cranial characters . Skull, compared with that of gapperi, long and 

 slender ; brain case narrower ; zygomata less spreading ; rostrum longer 

 and straighter ; audital bullse longer, natter, and less rounded ; both 

 upper and lower incisors slenderer ; lateral bridges of palate incomplete ; 

 molars as in gapperi, except the first upper, in which the edges of the 

 first and second inner salient loops meet and coalesce, inclosing a dentine 

 core. 



Measurements. Type specimen, measured from alcohol by Dr. C. Hart 

 Merriam : total length, 134; tail vertebrae, 39; hind foot, 19. Skull: 

 basal length, 22.8 ; nasals, 7 ; zygomatic breadth, 13.5 ; mastoid breadth, 

 1 L ; alveolar length of upper molar series, 5. 



General remarks. The type and only specimen was skinned and made 

 up from alcohol, and doubtless the colors have changed somewhat ; but 

 the small ears, slender feet and tail, and distinctive cranial characters 

 mark the species as entirely distinct from any other known form. In 

 geographic position it comes nearest to E. proteus Bangs, of Hamilton 

 Inlet, Labrador, but in characters differs more widely from that species 

 than from the more distant gapperi. 



In a letter to Dr. Merriam, Mr. Turner reported the species as abun 

 dant at Fort Chimo. 



Evotomys idahoensis Merriam. 



Evotomi/s idahoensis Merriam, North American Fauna No-. 5, p. 66, July 

 30,' 1891. 



Type locality. Sawtooth or Alturus Lake, east foot of Sawtooth Moun 

 tains, Idaho. 



Geographic range. Mountains of south central Idaho, between Snake 

 River and the Salmon. 



General characters. Size medium, larger than gapperi; conspicuously 

 different in color from any known species, the sides being clear gray ; 

 tail longer than in gapperi or galei ; ears not tipped with rufous; skull 

 narrow and smoothly rounded. 



Color. Dorsal stripe well defined, extending from in front of ears to 

 rump, pale hazel, somewhat darkened with black-tipped hairs; face, 

 sides, and rump clear ash gray ; belly washed with white or whitish ; 

 ears sooty gray without rufous tips ; feet gray ; tail bicolor, gray below, 

 blackish above. Side glands scarcely visible in the specimens at hand. 



Cranial characters. Skull long, narrow, and smooth, convex inter- 

 orbitally; zygomatic arches very oblique ; rostrum long; posterior margin 

 of palate straight ; pterygoids long and slender, longer, straighter, and 



