Remarks.—Dipodomys ordii fetosus has a small geographic range. [Hall] (1946:416) points out that the interorbital breadth in topotypes is less than in those from any other part of the range. This feature, therefore, is not useful in characterizing this subspecies. Intergradation with Dipodomys ordii columbianus is noted in the greater total length and the somewhat darker color in animals from Coal Valley and Garden Valley, Nevada. In the part of the range which lies in Utah, none of the animals is typical and all are intergrades in color and cranial characters with Dipodomys ordii celeripes.
Specimens examined.—Total, 136, distributed as follows:
Nevada: Nye County: White River Valley, 15 mi. WSW Sunnyside, 5500 ft., 26 (MVZ); White River Valley, 16-1/2 mi. WSW Sunnyside, 5500 ft., 6 (MVZ); 14 mi. NNE Sharp, 1 (MVZ); Garden Valley, 15 mi. NE Sharp, 1 (MVZ); Garden Valley, 14-1/2 mi. NE Sharp, 3 (MVZ); 8-1/2 mi. NE Sharp, 17 (MVZ). Lincoln County: E side Coal Valley, 14 mi. N Seeman Pass, 4850 ft., 4 (MVZ); 2 mi. SE Pioche, 1 (MVZ); E side Coal Valley, 10 mi. N Seeman Pass, 1 (MVZ); Desert Valley, 20 mi. SW Pioche, 1 (MVZ); 2 mi. N Panaca, 4800 ft., 17 (16 MVZ; 1 CAS); Desert Valley, 21 mi. W Panaca, 10 (MVZ); Crystal Spring, Pahranagat Valley, 4000 ft., 2 (MVZ); 10 mi. E Crystal Springs, 5000 ft., 1 (MVZ); 15 mi. S Groom Baldy, 1 (MVZ).
Utah: Millard County: 5 mi. S Garrison, 5400 ft., 12 (MVZ); Pine Valley, Sec. 33, T. 25 S, R. 17 W, 5000 ft., 16 (UU); Warm Cove, Sec. 34, T. 25 S, R. 18 W, 5500 ft., 2 (UU); Desert Range Experiment Station, 50 mi. W Milford, 5252 ft., 10 (9 UU; 1 BYU).
Dipodomys ordii utahensis (Merriam)
Perodipus montanus utahensis Merriam, Proc. Biol. Soc. Washington, 17:143, July 14, 1904.
Perodipus ordii utahensis, [Goldman], Proc. Biol. Soc. Washington, 30:113, May 23, 1917.
Dipodomys ordii columbianus, [Grinnell], Journ. Mamm., 2:96, May 2, 1921.
Dipodomys ordii columbianus, [Hall], Univ. California Publ. Zool., 37:5, April 10, 1931 (part—the part from Ogden, Utah.)