A New Pocket Mouse (Genus Perognathus) from Kansas

BY E. LENDELL COCKRUM
University of Kansas Publications Museum of Natural History Volume 5, No. 11, pp. 203-206 December 15, 1951
University of Kansas LAWRENCE 1951
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. 11, pp. 203-206 December 15, 1951 University of Kansas Lawrence, Kansas PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1951 23-8186

BY E. LENDELL COCKRUM
In studying the kinds of mammals known from Kansas, I had occasion to examine a series of Perognathus flavus from the western part of the state. Comparisons of these specimens with topotypes of named subspecies revealed that the specimens from Kansas belong to a heretofore undescribed subspecies which ranges through western Nebraska, eastern Colorado, western Kansas, and western Oklahoma. This subspecies is named and described as follows.
Perognathus flavus bunkeri , new subspecies
Type. —Female, adult, skin and skull; No. 11716, Univ. Kansas Mus. Nat. Hist.; Conard Farm, 1 mi. E Coolidge, Hamilton County, Kansas; 1 July 1936; obtained by F. Parks and C. W. Hibbard, original No. 894 of Hibbard.
Diagnosis. —Size large (see measurements). Color light, upper parts between Pinkish Buff and Cinnamon-Buff (capitalized color terms after Ridgway, Color Standards and Color Nomenclature, Washington, D. C., 1912), sparsely mixed with black hairs; the effect at a distance of eight feet, is between Clay Color and Tawny-Olive; lateral line between Pinkish Buff and Cinnamon-Buff; postauricular spots near Pinkish Buff; small subauricular spots white; underparts white. Skull of medium size (see measurements); frontonasal and mastoidal regions much enlarged; interparietal transversely narrow.
Comparisons. —From topotypes of P. f. flavus from El Paso, El Paso County, Texas, P. f. bunkeri differs as follows: Averaging larger in all cranial measurements taken except in occipitonasal length, which is approximately the same, and in interparietal width, which is less; color more buffy, with fewer black hairs dorsally. From topotypes of P. f. piperi from 23 miles southwest of Newcastle, Weston County, Wyoming, P. f. bunkeri differs as follows: Smaller in frontonasal length, mastoidal breadth, and length of auditory bulla; color more buffy, with fewer black hairs dorsally. From topotypes of P. f. sanluisi from nine miles east of Center, Alamosa County, Colorado, P. f. bunkeri differs as follows: Averaging larger in all cranial measurements taken except interparietal width, which is smaller; color lighter and more buffy.