176 The Mammals of Colorado 
A specimen taken at Coventry, Montrose County, Dec. 6th, is much 
grayer all over. One taken near Wolcott, Eagle County, July 2 2d, 
is darker than the September specimen, with more black in the 
middle dorsal stripe. The whole appearance of hopiensis is that 
of a lighter and brighter colored animal than quadrivittatus . 
Distribution. — This species is found in northern Arizona, southern 
or southeastern Utah, and southwestern Colorado, and very pos- 
sibly northwest New Mexico. 
It is found through the cedar and pinon zone of western Colorado, 
ranging from Rio Blanco County south and west to the southern 
and western boundaries of the State, but not, at least so far as is 
now known, extending into the mountains. Its vertical range is 
probably little, if any, above 7,000 feet altitude. Yarmony Creek, 
Eagle County, is at present the most northeastern record. It has 
been taken in Montezuma, Montrose, Mesa, Delta, Rio Blanco, and 
Eagle counties. 
Habits. — The general habits of the Hopi Chipmunk differ 
little, if any, from those of the other species. At Yarmony 
Creek, near the corner to Eagle, Grand, and Routt counties, 
half- and two-thirds-grown young were found May 22, 1907. 
Eutamias amoenus operarius (Lat. amoenus, pleasant; 
operari, to work). Busy Chipmunk. 
Eutamias amcBnus operarius Merriam, Proc. Biol. Soc. Wash., 
xviii., p. 164 (1905). 
Type locality. — Gold Hill, Boulder County, Colorado (Vernon 
Bailey). 
Measurements. — Total length, 8.00 ; tail vert., 3.5 ; hind foot, 1.25. 
Description. — (From a Park County specimen, taken August 7th) : 
Middle, and inner pair of dark stripes quite broad and black, with 
indistinct rufous borders; outer pair dark stripes less distinct, 
mixed black and rufous; light stripes broad, and grayish white, 
the outer pair being the whitest; sides light rufous; flanks gray; 
upper surfaces of feet light dull rufous; light facial stripes grayish 
white; dark ones blackish; large whitish post-auricular patch; 
below, rusty white; upper surface of tail mixed rusty and black; 
below, rufous, black bordered ; the tail is much bushier than in E. 
minimus or E. consobrinus. 
The seasonal changes of pelage do not seem to be very strongly 
marked, though the tone of the winter pelage is somewhat grayer. 
The skull is larger and more massive than in minimus, consobrinus, or 
caryi, and in case of doubt affords, in connection with the longer 
