Evotomys gapperi saturatus [Taylor] and [Shaw], Occ. Pap. Chas. R. Conner Mus., no. 2:23, December, 1929.
Clethrionomys gapperi cascadensis [Booth], Murrelet, 26:27, August 10, 1945.
Type.—Obtained 2 miles south of Blewett Pass, 3,000 ft. elevation, Kittitas County, Washington, by G. G. Cantwell, on October 30, 1921; type in United States National Museum.
Racial characters.—Dark and dull with underparts dull buffy.
Measurements.—Ten adults from the Cascade Mountains average ([Booth], 1945: 27): total length 162; length of tail 50; hind foot 19; ear 14.
Distribution.—The Cascade Mountains, according to [Booth] (loc. cit., p. 28), from Hannegan Pass south to Mount Adams. Marginal localities listed are: Swamp Creek, Glacier Peak, McKenna, and Mt. St. Helens. These, and other localities listed by [Booth] are not plotted on the accompanying distribution map (fig. 111).
Clethrionomys gapperi nivarius ([Bailey])
Evotomys nivarius [Bailey], Proc. Biol. Soc. Washington, 11:136, May 13, 1897.
Evotomys gapperi nivarius [Taylor] and [Shaw], Occ. Papers Chas. R. Conner Mus., no. 2:23, 1929.
Clethrionomys nivarius [Svihla], Murrelet, 12:54, May, 1931.