Type.—Obtained on the northwest slope of Mt. Ellinor, 4,000 ft. elevation, Mason County, Washington, by C. P. Streator, on July 9, 1894; type in United States National Museum.
Racial characters.—Similar to saturatus but paler throughout.
Measurements.—Two males and a female from 1 mile northwest of Lake Cushman, Mason County, average: total length 140; length of tail 42; hind foot 18; ear 13.
Distribution.—The Olympic Mountains, from Sol Duc Hot Springs (W.S.M.) south and west at least to Staircase, on Lake Cushman (W.W.D.).
Clethrionomys californicus occidentalis ([Merriam])
California red-backed mouse
Evotomys occidentalis [Merriam], N. Amer. Fauna, 4:25, October 8, 1890.
Evotomys pygmaeus [Rhoads], Proc. Acad. Nat. Sci. Philadelphia, p. 284, October 23, 1894 (type from mouth of Nisqually River, Pierce County, Washington).
Evotomys gapperi occidentalis [Taylor] and [Shaw], Occ. Papers Chas. R. Conner Mus., no. 2:23, 1929.
Clethrionomys occidentalis [Hall], Murrelet, 13:79, September, 1932.