Racial characters.—Similar to nevadensis in color but smaller, with smaller, lighter skull. Color in winter white with black tip on tail.
Measurements.—A female from Prescott, Walla Walla County, measures: total length 310; length of tail 105; hind foot 34.
Distribution.—Southeastern Washington, south of the Snake River. Specimens from Walla Walla and Prescott have been examined.
Mustela frenata washingtoni ([Merriam])
Putorius washingtoni [Merriam], N. Amer. Fauna, 11:18, June 30, 1896.
Mustela washingtoni [Miller], U. S. Nat. Mus. Bull., 79:98, December 31, 1912.
Mustela frenata washingtoni [Hall], Carnegie Inst. Washington, Publ. 473:106, November 20, 1936.
Type.—Obtained at Trout Lake, Skamania County, Washington, by D. N. Kaegi on December 15, 1895; type in United States National Museum.
Racial characters.—Color rich, dark; hind feet free of color of underparts.
Measurements.—A male from Spray Park, Pierce County, measures: total length 423; length of tail 164; hind foot 52.