Racial characters.—Similar to hudsonica but larger; stripes narrower, diverging anteriorly on neck or back of head; tail shorter, sometimes without long, white hairs.
Measurements.—[Howell] (1901:37) gives the average of 3 adult males from Trout Lake, Klickitat County, as: total length 633; length of tail 249; hind foot 76.
Distribution.—The Columbia River Valley of the southern Cascades from the Wind River east to the Snake River and the Yakima Valley area (trappers' reports).
Mephitis mephitis spissigrada Bangs
Mephitis spissigrada Bangs, Proc. Biol. Soc. Washington, 12:31, March 24, 1898.
Mephitis foetulenta [Elliot], Field Columb. Mus., Publ. 32, zoöl. ser., 1:269, March, 1899 (type from Laguna, near Port Angeles, Clallam County, Washington).
Chincha occidentalis spissigrada [Howell], N. Amer. Fauna, 20:35, August 31, 1901.
Mephitis mephitis spissigrada [Hall], Carnegie Inst. Publ. 473:67, November 20, 1936.
Type.—Obtained at Sumas [prairie], British Columbia, by A. Brooks on September 30, 1895; type in Museum of Comparative Zoölogy.
Racial characters.—Similar to hudsonica but larger; stripes broader, usually diverging on shoulders; hairs of stripes often cream color or yellowish near base; end of tail usually white.