longer nasals.

In comparison with three adult _C. g. loringi_ from Elk River,
Sherburne County, Minnesota, _C. g. brevicaudus_ has a greater total
length, longer hind foot, greater basal length, conspicuously greater
zygomatic and lambdoidal breadths, much longer nasals, and a narrower
rostrum.

_Clethrionomys gapperi brevicaudus_, although isolated geographically
and although morphologically more distinct than many of the currently
recognized subspecies of _C. gapperi_, is probably best arranged as a
subspecies of _C. gapperi_ rather than as a full species. In certain
characters, such as interorbital breadth and breadth of rostrum, it is
intermediate between _C. g. galei_ and _C. g. loringi_, but it
resembles _C. g. galei_ more than it does any other named kind.

_Specimens examined._--Total, 66. Unless otherwise indicated,
specimens from Wyoming are in the University of Kansas Museum of
Natural History and specimens from South Dakota are in the University
of Michigan Museum of Zoology. Specimens are distributed as follows:

+Wyoming+: _Crook County_: 3 mi. NW Sundance, 5900 ft., 3. _Weston
County_: 1-1/2 mi. E Buckhorn, 6150 ft., 21; 12 mi. SE Newcastle, 1
(Univ. Michigan).

+South Dakota+: _Pennington County_: 1/2 mi. E Rochford, 1; 17 mi. NW
Custer, 1; 16 mi. NW Custer, 20; 16 mi. SW Rapid City, 1; 3 mi. SE
Hill City, 2; 4 mi. SE Hill City, 13; 5 mi. SE Hill City, Harney Peak,
7240 ft., 1. _Custer County_: 1-1/2 mi. E Sylvan Lake, 1.

+Clethrionomys gapperi uintaensis+ Doutt

1897. _Evotomys gapperi galei_, Bailey, Proc. Biol. Soc. Washington,
11:127 (part from Uinta Mts. of Wyoming), May 13.

1941. _Clethrionomys gapperi uintaensis_ Doutt, Proc. Biol. Soc.
Washington, 54:161, Dec. 8.

_Type locality._--Paradise Park, 10,050 feet, 45 miles by road
northwest Vernal, Uintah County, Utah.

_Range._--The Uinta Mountains of northern Utah and southwestern
Wyoming.

_Remarks._--From the description given by Doutt (Proc. Biol. Soc.
Washington, 54:161, 1941) in his original description of this
subspecies, it appears that he had available for comparisons, only
subadult specimens of _C. g. galei_. As judged from the material of
_C. g. uintaensis_ available to us (1 topotype, KU 38081, and 7
specimens from Uinta County, Wyoming, listed below) and from Doutt's
(_op. cit._) description and measurements, the subspecies _C. g.
uintaensis_ is but weakly differentiated from _C. g. galei_. No marked
cran