Wortman's Ground Squirrel 169 
Callospermophilus wortmani. Wortman's Ground Squirrel 
Tarnias wortmani Allen, Bull. Am. Mus. N. H., vii., p. 335 (1895). 
Type locality. — Kinney Ranch, Bitter Creek, Sweetwater County, 
Wyoming. 
Measurements. — As in lateralis. 
Description. — (From specimen in fresh pelage taken on Snake 
River, Routt County, June 2 ist) : A paler animal than the preceding, 
but the pattern of coloration is exactly the same. The rufous and 
chestnut are much paler, while the inner black dorsal stripe is but 
faintly indicated, almost obsolete ; the outer dark stripe is much less 
black; the light stripe is much whiter; the chestnut of the flanks, 
shoulders, and sides of neck, though bright, is of a much lighter 
shade ; upper surfaces of feet paler, almost white ; below, the animal is 
white in comparison with lateralis; in the upper surface of the tail the 
chestnut is a little more prominent, and below it is much paler. 
Distribution. — At present Wortman's Ground Squirrel seems to 
be known only from the type locality, and from western Routt 
County, Colorado. In our State it is an inhabitant of the arid region 
of the Snake River Valley, w^here I took it on the west slope of 
Cross Mountain, about eight miles above Lily P. O., and also 
three miles farther up the Snake; I found it at Douglas Springs, in 
the Escalante Hills; Cary took specimens on the upper part of the 
Snake, near the Wyoming line. 
FIG. 56. say's ground SQUIRREL, C. lateralis, and related chip- 
munk, E. m. consobriniis 
Note difference in size and stripes. From life, E. R. Warren, Photo. 
