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Geographic Variation
in Red-backed Mice (Genus Clethrionomys)
of the Southern Rocky Mountain Region
BY
E. LENDELL COCKRUM and KENNETH L. FITCH
University of Kansas Publications
Museum of Natural History
Volume 5, No. 22, pp. 281-292, 1 figure in text
November 15, 1952
UNIVERSITY OF KANSAS
LAWRENCE
1952
University of Kansas Publications, Museum of Natural History
Editors: E. Raymond Hall, Chairman, A. Byron Leonard,
Edward H. Taylor, Robert W. Wilson
Volume 5, No. 22, pp. 281-292, 1 figure in text
November 15, 1952
University of Kansas
Lawrence, Kansas
PRINTED BY
FERD VOILAND, JR., STATE PRINTER
TOPEKA, KANSAS
1952
24-4369
Geographic Variation
in Red-backed Mice (Genus Clethrionomys)
of the Southern Rocky Mountain Region
BY
E. LENDELL COCKRUM and KENNETH L. FITCH
In the course of the preparation of a synopsis of the NorthAmerican terrestrial microtines by one of us (Cockrum), and thecompletion of a Master's thesis on the geographical variation ofthe red-backed mice of Wyoming by the other (Fitch) we hadoccasion to study the red-backed mice of the southern RockyMountain region (see figure 1). Results of these studies are therecognition of two heretofore unnamed subspecies of the red-backedmouse in the southern Rocky Mountain region, and a clarificationof the taxonomic status of two additional kinds.
1890. Evotomys galei Merriam, N. Amer. Fauna, 4:23, October 8.
1931. Clethrionomys gapperi galei, Hall, Univ. California Publ. Zool., 37:6,April 10.
1897. Evotomys gapperi galei, Bailey, Proc. Biol. Soc. Washington, 11:126,May 13.
Type locality.--Ward, 9500 feet, Boulder County, Colorado.
Range.--The Rocky Mountains of extreme southern Alberta, Montana,northwestern and southern Wyoming, and north and central Colorado.
Remarks.--C. g. galei, with the largest geographic range of anyof the Rocky Mountain subspecies, is also the most variable. Threeprincipal areas of geographic variation were found. These areasare: The mountains of north-central Colorado and southern Wyoming(this area includes the type locality); the Big Horn areaprobably northwest into Montana (no adult specimens from Montanaor Alberta examined); and the Teton area which includes themountains east and southeast of Yellowstone National