; 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.

_Remarks._--This is a brightly colored subspecies of _Perognathus
flavus_, with less black dorsally than any adjacent one. The lateral
line is well marked. Three young adult specimens taken from Wakeeney,
Trego County, Kansas, are much brighter than other specimens from
Kansas. The five specimens from Greeley, Weld County, Colorado, are
much darker dorsally, like _P. f. piperi_, but are referable to _P. f.
bunkeri_ on the basis of cranial characters.

The name _P. f. bunkeri_ is proposed in recognization of the continued
attention which the late Charles Dean Bunker, Curator of Birds and
Mammals of the University of Kansas Museum of Natural History, gave to
building up the collection of mammals from Kansas. Acknowledgment is
made of the assistance afforded me by a Research Assistantship with the
Kansas Biological Survey.

_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