I04 The Mammals of Colorado 
Type locality. — Salmon River Mountains, Idaho, alt. 10,500 ft. 
(C. H. Merriam and V. Bailey). 
Measurements. — Total length, 5.5; tail vert., 1.15; hind foot, 
0.70. 
Description. — (From specimen taken at Lake Moraine, El Paso 
Co., altitude 10,250 feet): Above grayish brown, with yellowish 
tinge ; feet and underparts whitish, plumbeous bases of hairs show- 
ing through. Tail bicolor, white below, mixed brown and white 
above. 
Distribution. — Miller, in his Synopsis of the Genus, gives the 
distribution as Hudsonian Zone and parts of Canadian Zone, in the 
mountains of Alberta, British Columbia, and the western United 
States south to southern Wyoming, central Idaho, and south 
central Oregon. I have taken it in Colorado, at Lake Moraine, 
El Paso County, at an elevation of 10,250 feet. But the one 
specimen has been taken, and it must be very rare, as much 
collecting had been done at that locality. 
Habits. — But little is known of the habits of these voles. 
They seem to inhabit the high dryer mountain meadows, 
and are at times, at least, associated with Microtus and 
Evoto7nys. 
Phenacomys preblei (named for E. A. Preble, who collected 
the first specimen). Preble's Mountain Vole. 
Phenacomys preblei Merriam, Proc. Biol. Soc. Wash., xi., p. 45 
(1897)- 
Type locality. — Twin or Lillie's Peak, near Long's Peak, Boulder 
Co., Colorado. Altitude 9,000 ft. 
Measurements. — Total length, 5.1 ; tail vert., 1.15 ; hind foot, 0.67. 
Description. — (From Merriam I. c): Upper parts clay color, 
suffused with ochraceous buff, and heavily lined on the back with 
black-tipped hairs; feet soiled whitish; under parts white, with a 
yellowish tinge, the plumbeous under color showing through. 
Distribution. — Up to the present time Preble's Vole is only known 
from the type locality, which is Twin or Lillie's Peak, near Long's 
Peak, and from North Boulder Creek, at about 9,500 feet elevation, 
taken by R. T. Young. 
Habits. — ^Nothing is known of its habits. Mr. Preble, the 
collector of the type, states that "the locality was perfectly 
