Type.—Obtained "in pine [= conifer] woods of the Columbia near the sea" by J. K. [Townsend] in 1839. Probably near St. Helen, Columbia County, Oregon ([Rhoads], 1897:324).
Racial characters.—Small size, rich color.
Measurements.—A male from Cottage Lake, King County, measured: total length 287; length of tail 125; hind foot 38. A female from 5 miles southeast of Sequim, Clallam County, measured: 303; 133; 41; ear 27. A male from Quilcene, Jefferson County, measured: 311; 140; 41.
Distribution.—Western Washington west of the Cascade Mountains. The locality records for flying squirrels in the northern Cascade Mountains, given by [Taylor] and [Shaw] (1929: 18), when plotted on a distribution map, show overlapping of ranges in this area. The ranges of the three races involved have been drawn on the accompanying map (fig. 92) on the basis of geographic probability and are subject to revision because the specimens from this area have not been examined.
Marginal records that may apply to G. s. oregonensis are, from [Taylor] and [Shaw] (1929: 18): Nooksack River, Rockport, North Bend and Skamania.
Remarks.—Of all the races occurring in Washington, oregonensis is the most distinct. Glaucomys s. olympicus [Elliot] must be regarded as a synonym of oregonensis.
Glaucomys sabrinus bangsi ([Rhoads])
Sciuropterus alpinus bangsi [Rhoads], Proc. Acad. Nat. Sci. Philadelphia, p. 321, June, 1897.
Glaucomys sabrinus bangsi [Howell], N. Amer. Fauna, 44:38, June 13, 1918.
Type.—Obtained in Idaho County, Idaho, by Harbison and Bargamin on March 8, 1897; type in Philadelphia Academy of Natural Sciences.