Measurements.—Two male and 4 female topotypes average, respectively: total length 184, 184; length of tail 54, 55; hind foot 25, 25; weight 89, 71 grams.
Distribution.—The Columbian Plateau. Marginal occurrences of the races of pocket gophers occurring in Washington are not listed here because they have recently been placed on record ([Dalquest] and [Scheffer], 1944: 308-333, 423-450).
Remarks.—This is the smallest and palest race of pocket gopher found in Washington.
Thomomys talpoides columbianus [Bailey]
Thomomys fuscus columbianus [Bailey], Proc. Biol. Soc. Washington, 27:117, July 10, 1914.
Thomomys columbianus [Bailey], N. Amer. Fauna, 39:106, November 15, 1915.
Thomomys talpoides columbianus [Goldman], Jour. Mamm., 20:234, May 15, 1939.
Type.—Obtained at Touchet, Walla Walla County, Washington, by C. P. Streator on September 10, 1890; type in United States National Museum.
Racial characters.—Larger and brighter in color than devexus. Near ochraceous orange in color.