32 The Mammals of Colorado 
Lepus campestris (Lat., of the fields). White-tailed Jack 
Rabbit. 
Lepus campestris Bachman, Journ. Acad. Nat. Sci. Phila., viii., 
P- 349 (1837)- 
Type locality. — Plains of the Saskatchewan, Canada, probably 
from near Carlton House. 
Measurements. — Total length, 22; tail vert. 3.25; hind foot, 5.75; 
ear, 5.75. 
Description. — Summer pelage: Yellowish buffy gray above, 
varying in brightness, usually darkened by brownish color of under 
fur showing through; sides of head somewhat paler or grayer than 
FIG. 10. Lepus campestris, white-tailed jack rabbit 
Dorsal view of skull, about natural size 
back ; sides of nose and ring around eye wdiite ; nape pale dull buffy ; 
rump similar to rest of back, a little paler on sides ; tail usually en- 
tirely white, but sometimes with black or dusky hairs on middle of 
upper side, forming a narrow median line; this is present in every 
specimen I have seen from the San Luis Valley; front and outside 
of fore legs and tops of fore feet dingy buffy, varying somewhat 
from grayish to ochraceous ; outside of hind legs a little duller than 
back; rump in midsummer similar to back, but pale in early spring 
and late fall; underside of neck dull buffy, sometimes grayish tinged, 
sometimes ochraceous; rest of underparts white; anterior half 
