Busy Chipmunk 177 
hind foot, a good means of identification. Its smaller size, and 
proportionately longer tail serve to distinguish it from quadrivittatus 
which is the one of the larger chipmunks that it most resembles. 
Distribution. — This Chipmunk is found principally east of the 
Continental Divide, ranging from the foot-hills to and above timber- 
line, and also being found west of the Divide in Grand, Summit, 
Hinsdale, and San Juan counties; Elkhorn and Livermore, Larimer 
County, are the most northern records; Silverton, San Juan County, 
is the most southwestern; and Fisher's Peak, Las Animas County, 
is the most southeastern. It has been reported from the following 
counties in the State: Larimer, Grand, Boulder, Jefferson, Clear 
Creek, Arapahoe, El Paso, Teller, Park, Summit, Lake, Eagle, 
Chaffee, Las Animas, Hinsdale, and San Juan. 
I know of no records of its occurrence outside the State of 
Colorado. 
Habits. — The Busy Chipmunk is found in various kinds 
of country throughout its range, in the pine and spruce 
forests, in the brush along streams, among rocks and fallen 
timber, in fact in almost any place except entirely open 
ground. 
A specimen taken near Colorado Springs, May nth, con- 
tained five good-sized foetuses. On Boreas Pass, August 
ist, at 11,000 feet, two-thirds-grown young were taken. 
Eutamias minimus (Lat., least). Least Chipmunk 
Eutamias minimus Bachman, Jour. Acad. Nat. Sci. Phila., p. 71 
(1839). 
Type locality. — Green River, southwestern Wyoming. 
Measurements. — Total length, 7.5 ; tail vert., 3.35 ; hind foot, 1.14, 
Description. — (From a specimen taken on the Snake River, Routt 
County, June 21st): A pale faded-looking animal, the palest, 
except caryi, of the seven Colorado Chipmunks having prominent 
stripes. But the darker stripes are quite black, edged with rufous, 
the outer pair extending well forward, and w4th not as much 
black as the others; inner pair of light stripes grayish, outer pair 
much whiter ; a distinct whitish postauricular spot ; greater portion 
of ear grayish; top of head distinctly gray; facial stripes not very 
marked, hght ones whitish, dark ones pale rufous, with a little 
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