| 22.4 | 14.9 | 17.4 | 12.6 | 5.0 | 5.4 | 8.5 | 7.1 | 3.5
-----------+-------+-------+-------+-------+-----+-----+------+-----+-----
| _P. f. litus_, topotype
[F] 160599 | | | | | | | | |
USBS | 22.2 | 14.7 | 17.4 | 11.9 | 5.0 | 5.0 | 8.7 | 7.0 | 3.3
-----------+-------+-------+-------+-------+-----+-----+------+-----+-----
| 8 mi. SE Lost Soldier, 6700 ft., Wyoming
[F] 166866 | | | | | | | | |
USBS | 22.1 | 14.6 | 17.4 | 12.0 | 5.2 | 4.5 | 8.4 | 7.1 | 3.3
-----------+-------+-------+-------+-------+-----+-----+------+-----+-----
| _P. f. callistus_, Sweetwater County, Wyoming
10, 6 [M] | | | | | | | | |
and 4 [F] | 23.1 | 15.1 | 18.0^8| 12.9^8| 5.2 | 4.5 | 8.7 | 7.6 | 3.4
min. | 22.7 | 14.7 | 17.5 | 12.7 | 5.0 | 4.1 | 8.5 | 7.3 | 3.3
max. | 24.4 | 15.9 | 18.9 | 13.1 | 5.4 | 4.9 | 8.9 | 7.8 | 3.5
-----------+-------+-------+-------+-------+-----+-----+------+-----+-----

[Footnote 1: Basal length was taken from the anteriormost inferior
border of the foramen magnum to the anteriormost projections of the
incisors.]

LITERATURE CITED

CARY, M.
1911. A new pocket mouse from Wyoming. Proc. Biol. Soc. Washington,
24:61, March 22.

1917. Life Zone investigations in Wyoming. N. Amer. Fauna, 42:1-95,
October 3.

DURRANT, S. D.
1952. Mammals of Utah, taxonomy and distribution. Univ. Kansas
Publ., Mus. Nat. Hist., 6:1-549, August 10.

GOLDMAN, E. A.
1918. Five new mammals from Arizona and Colorado. Proc. Biol. Soc.
Washington, 31:21-26, May 16.

MOORE, J. E.
1953. Notes on three additions to the rodent fauna of Alberta.
Canadian Field Nat., 66:142-143, February 28.

OSGOOD, W. H.
1900. Revision of the pocket mice of the genus Perognathus. N.
Amer. Fauna, 18:1-72, September 20.

SWENK, M. H.
1940. A study of the geographical and ecological distribution of
the buffy plains pocket mouse (Perognathus flavescens
flavescens), with description of a new subspecies from
Nebraska. Missouri Valley Fauna, 3:1-8, June 5.

_University of Kansas Museum of Natural History, Lawrence, Kansas.
Transmitted, April 20, 1953._

24-7673

End of t