238 
The Mammals of Colorado 
by admixture of white hairs; face grayish, Hghtest back of eyes; 
ears blackish behind; sides paler than back; underparts whitish, 
hairs plumbeous at base, as also the under fur; chin gray, rather 
blackish; forelegs dark reddish fulvous, foot black in front; hind 
legs fulvous on outside, whitish on inside, foot black in front; tail 
large and bushy, mixed fulvous, black and gray, the black being on 
the tips of the hairs ; little black on the underside of the tail ; about 
2h ins. of tip of tail white. The depth of the color of the back varies 
much with individuals. 
Cross Phase. — (From specimen from Breckenridge, Colo., Carter 
Coll., in Colo. Mus. Nat. Hist., Denver) : Above, from the shoulders 
back, gray, a mixture of black, white, and gray hairs; black stripe 
across shoulders; top of head similar to back; sides of muzzle 
blackish; back of ears black; sides of head and body fulvous; feet, 
legs, and underparts black; tail white-tipped; hairs of rest of tail 
all, or almost all, black on ends, but fulvous and gray can be seen 
through this. Some cross foxes have much more fulvous on back, 
and others less. 
FIG. 77. WESTERN RED FOX, Vulpes macTOurus 
An individual which had been trapped and kept in captivity 
several days. E. R. Warren, Photo. 
Silver or Black Phase. — (From specimen from Cumbres Pass, 
Conejos Co., in Colo. Mus. Nat. Hist.) : Above black, hairs with 
white tips, giving the silver-gray effect ; shoulders black; top of head 
like back; ears and muzzle black; feet, legs, and underparts black. 
