y, 3; 1-1/2 mi. S of Pilger, Stanton County, 2.

The two specimens from Beemer are typical _perniger_. All of the other
Nebraskan specimens are intergrades between _P. f. flavescens_,
geographically adjacent to the west, and _P. f. perniger_ to the east
but are best referred to _perniger_ on the basis of greater total
length, larger cranial measurements and darker dorsal coloration.

_P. f. perniger_ was originally described (Osgood, _op. cit._) on the
basis of its darker dorsal coloration and encroachment of the lateral
line on the posterior parts of the venter. The latter character is not
present in all Nebraskan specimens. Mice from the two localities in
Knox County have buffy underparts; those from other Nebraskan
localities do not. Of nine specimens of _P. f. perniger_ examined from
Elk River, Sherburne County, Minnesota, none has buffy underparts
whereas a specimen from Randolph, Fremont County, Iowa (NSM) does. In
addition, in two of five specimens of _P. f. flavescens_ from Kelso,
Hooker County, (MZ) the lateral line encroaches on the underparts. The
encroachment of the lateral line on the underparts, or failure of the
line to do so, is thought to be only an individual variation and of no
taxonomic use.

=Perognathus flavus piperi= Goldman. BUFFY POCKET MOUSE.--In the
description of _P. f. bunkeri_, Cockrum (1951:206) allocated to the new
subspecies, without comment, a specimen from Alliance, Box Butte
County. I have examined this specimen along with all other Nebraskan
specimens known to me and, although all approach _bunkeri_ in cranial
measurements, they seem best referred to _piperi_ on the basis of
darker dorsal coloration and larger external measurements. Additional
records of occurrence, several of them marginal to the eastward, are:
10 mi. S of Antioch, Garden County, 1 (MZ); Kelso, Hooker County, 4
(MZ); 5 mi. N of Bridgeport, Morrill County, 1 (MVZ); 6 mi. N of
Mitchell, Scotts Bluff County, 1 (NSM). A specimen not seen by me that
was reported from Valentine, Cherry County (Beed, 1936:21), is
presumably also best referred to _P. f. piperi_.

No specimens of _P. flavus_ are known to me from south of the Platte
River in southwestern Nebraska although they probably occur there. If
so, they may be referable to _P. f. bunkeri_, which is found in
counties of Kansas adjoining the southwestern part of Nebraska.

=Perognathus hispidus paradoxus= Merriam. HISPID POCKET MOUSE.--This
subspecies occurs commonl