A New Pocket Mouse (Genus Perognathus)

from Kansas

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.

Measurements.—Measurements of holotype and average of four adults
(two males and two females) from the type locality are as follows: total
length, 104, 105.2; length of tail, 44, 47.5; length of hind foot, 16, 16.7; length
of ear, 7, 7.2; occipitonasal length, 20.6, 20.9; frontonasal length, 14.0, 13.9;
mastoidal breadth, 12.1, 12.0; length of bulla, 8.0, 7.8; interorbital breadth,
4.5, 4.6; alveolar length of upper molariform tooth-row, 3.3, 3.1; interparietal
width, 3.2, 3.2. All of the measurements listed above are available for each
of the five specimens except that the occipitonasal length and frontonasal
length are not available for the two males.

Specimens examined.—Total, 54, distributed by localities of capture as shown
below. Those from Nebraska and Colorado are in the US Nat'l Mus., Biol.
Surv. Coll., and those from Kansas are in the Univ. Kansas Mus. Nat. Hist.

Nebraska:—Box Butte Co.: Alliance, 1.

Colorado:—Weld Co.: Greeley, 5. Kit Carson Co.: Burlington, 1. Fremont
Co.: Canon City, 1.

Kansas:—Cheyenne County: 23 mi. [by road] NW St. Francis, 1. Rawlins
County: 12 mi. NE McDonald, 1; 2 mi. NE Ludell, 1. Decatur County:
2 mi. S, 6 mi. W Oberlin, 1. Logan County: Vincent Ranch, N. Fork Smoky
R., [= 4 mi. W and 8 mi. N McAllaster], 2; unspecified, 1. Gove County:
Castle Rock, 1. Trego County: Wakeeney, 3. Hamilton County: 1 mi. E
Coolidge, 8. Stanton County: 6 mi. W, 1-1/2 mi. S Manter, 1; 8-1/2 mi. W, 2-1/2 mi.
S Manter, 1. Kiowa County: Rezeau Ranch, 5 mi. N Belvidere, 1. Morton
County: 9 mi. N, 3 mi. E Elkhart, 18. Meade County: 9 mi. SW Meade, 1;
17 mi. SW Meade, 2. Clark County: Stephenson Ranch, 7 mi. S Kingsdown,
1.

Oklahoma:—Texas County: 2 mi. E Eva, 1.