. A biological survey of Colorado. Natural history Colorado; Mammals Colorado; Trees Colorado. MAMMALS. 87 Citellus variegatus grammurus (Say). Mock Sfjuirrcl. iSciurKs (jnunmurus Say, in Long's Kxjx'd. Ilocky , H, p. 72, ]82:>. Type from Piirgalory Jlivcr, neurmoulli of Cliaciiaco Creek, AiiiinuH Counfy, Colorado. The laro;c ^ray rock squirrc^l is amon^^ llio rock IcmIi^os of the eastern foothills, and also throughout tlie warm valleys of southei'n and southwestern Colorado north to the southern base of the Book ClifTs mainly in the Upper Sonoran zone. East of t
. A biological survey of Colorado. Natural history Colorado; Mammals Colorado; Trees Colorado. MAMMALS. 87 Citellus variegatus grammurus (Say). Mock Sfjuirrcl. iSciurKs (jnunmurus Say, in Long's Kxjx'd. Ilocky , H, p. 72, ]82:>. Type from Piirgalory Jlivcr, neurmoulli of Cliaciiaco Creek, AiiiinuH Counfy, Colorado. The laro;c ^ray rock squirrc^l is amon^^ llio rock IcmIi^os of the eastern foothills, and also throughout tlie warm valleys of southei'n and southwestern Colorado north to the southern base of the Book ClifTs mainly in the Upper Sonoran zone. East of the mountains it is not known to extend north to the Wyoming line, but is found in the footliills west of Fort Collins. Along the eastern slope of the moun- tains it occurs regularly in open, rocky situations up to 7,000 feet,. Fig. 7.—Distribution in Colorado of rock squirrel ( Citellus variegatus gramm urus). and toward the south is occasionally found to 8,000 feet. In the Grand River Valley the upper limit appears to be at 6,500 feet, a httle below the upper edge of the juniper and piny on belt. In some of the southwestern valleys, however, it ranges considerably higher, and on the southwestern slopes of the Uncompahgre Plateau extends well into the yellow pine belt wherever suitable rocky ledges occur. (See fig. 7.) The Biological Survey has specimens of grammurus from Higbee, Otero County, which are practically topotypes. Specimens from both eastern and western slopes are fairly typical, those from western Colorado not differing sufficiently to be referred to C. v. utah, described by Dr. Merriam from Ogden, Utah. Rock squirrels which I savv' in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cary, Merritt, 1880-1918; United States. Bureau of Biological Survey. Washington : Government Printing Office
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