UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY Volume 7, No. 11, pp. 587-590 November 15, 1954 A New Subspecies of Pocket Mouse from Kansas BY E. RAYMOND HALL UNIVERSITY OF KANSAS LAWRENCE 1954 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, A. Byron Leonard, Robert W. Wilson Volume 7, No. 11, pp. 587-590 Published November 15, 1954 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1954 25-5678 A New Subspecies of Pocket Mouse from Kansas by E. Raymond Hall When preparing distribution maps for a revised list of the Mammals of Kansas it became apparent to me that pocket mice of the species _Perognathus flavescens_ from south-central Kansas and adjoining parts of Oklahoma were without a subspecific name. The new subspecies is named and described below. =Perognathus flavescens cockrumi= new subspecies _Holotype._--Female, subadult (P4 moderately worn), skin with skull, No. 13045, Univ. Kansas Mus. Nat. Hist.; 4-1/2 mi. NE Danville, Harper Co., Kansas; December 1, 1939; obtained by Sam Tihen; original No. 99 of J. A. Tihen. _Range._--South-central Kansas south at least into Dewey County, Oklahoma. _Diagnosis._--Size small; upper parts Ochraceous-Buff (capitalized color terms after Ridgway, Color Standards and Color Nomenclature, Washington, D. C., 1912) heavily suffused with black; postauricular patches and a band 8 mm wide on each side Ochraceous-Buff; subauricular spot, underparts, and forefeet white; hind feet slightly dusky; tail brownish above and white below. Skull small; tympanic bullae small; rostrum wide; skull indistinguishable from that of _P. f. flavescens_ from the same latitude in western Kansas. _Comparisons._--_Perognathus flavescens cockrumi_ averages approximately 12 per cent smaller in linear measurements than the more northern _Perognathus flavescens perniger_ Osgood (from Knox, Stanton and Cumming counties, Nebraska) but color of upper parts is essentially the same. From the more western _Perognathus flavescens flavescens_ Merriam (from Seward, Hamilton and Morton counties, Kansas), _cockrumi_ differs in being darker in all parts of the pelage except on the underparts which are white in both subspecies; the parts of the hairs that are Ochraceous-Buff in _cockrumi_ are Light Ochraceous-Buff in _flavescens_; the back of _cockrumi_ is blackish instead of yellowish. From the more southern _Perognathus flavescens copei_ Rhoads (topotypes examined but not at hand as I write), _cockrumi_ differs in duller more blackish (less bright and less reddish) upper parts. From _Perognathus merriami gilvus_, of more southern distribution, the new subspecies differs in much smaller tympanic bullae and wider rostrum. _Measurements._--The type, a male (35331/47596 U.S.B.S., from Cairo, Kansas, showing some wear on P4), and another male (60165 K. U., from Barber Co., Kansas, showing much wear on P4) measure, respectively: Total length, 114, 120, 124; tail, 51, 55, 58; hind foot, 17, 17, 18; occipitonasal length, ----, 21.0, 21.6; condylobasal length (condyles to anterior end of premaxillae), 18.5, 18.6, 19.3; frontonasal length, ----, 14.1, 14.3; mastoidal breadth, 10.5, 11.2, 11.2; length of bulla, 6.8, 7.1, 6.8; interorbital breadth, 4.7, 4.8, 5.1; alveolar length of upper molariform tooth-row, 3.1, 3.1, 3.0; interparietal breadth, 4.3. 4.6, 4.7. _Remarks._--The subspecific name _cockrumi_ is proposed in recognition of Dr. E. Lendell Cockrum's important contribution to our knowledge of the mammals of Kansas. Dr. W. Frank Blair recently suggested to me that the two specimens examined by him from Kansas (the one from Ellsworth County and the one here designated as holotype) should not be referred to _Perognathus flavescens copei_ Rhoads, as Cockrum (Univ. Kansas Publ., Mus. Nat. Hist., 7:146, August 25, 1952) had done, because _copei_ is paler, instead of darker, than _P. f. flavescens_. It was Dr. Blair's suggestion which lead me to realize that the subspecies in south-central Kansas lacked a name. Through the courtesy of Miss Viola S. Schantz I have examined three of the four specimens from Cairo, Kansas, that Osgood (N. Amer. Fauna, 18:21, September 20, 1900) referred to _Perognathus flavescens_ before any subspecies of that species had been recognized. The specimens from Cairo are intermediate in color, as they are also in geographic position, between _P. f. flavescens_ from western Kansas and _P. f. cockrumi_ from south-central Kansas but show more resemblance to the latter and therefore are referred to _P. f. cockrumi_. The specimens, excepting the three from Cairo, are in the Museum of Natural History at the University of Kansas. _Specimens examined._--Total, 10 distributed as follows: _=Kansas:=_ ELLSWORTH CO.: 1-1/2 mi. S Wilson, 1. PRATT CO.: Cairo, 3 (U.S. B.S.). BARBER CO.: Plum Thicket Farm [= 1 mi. E and 3 mi. N Sharon], 4. HARPER CO.: 4-1/2 mi. N Danville, 1. _=Oklahoma:=_ DEWEY CO.: 6 mi. W and 1/2 mi. S Canton, 1. _Transmitted August 23, 1954._ 25-5678 * * * * * Transcriber's Notes: Bold text is shown within =equal signs=. Italic text is shown within _underscores_. --- Provided by LoyalBooks.com ---