Type.—Obtained at Sitka, Alaska, by C. P. Streator on August 5, 1895; type in United States National Museum.
Racial characters.—Color dark, almost bronze; wing and tail membranes uniformly dark in color.
Measurements.—Five specimens from San Juan County, Washington, average: total length 80.9; length of tail 32.1; hind foot 12; ear 12; height of tragus 7; weight 5.4 grams.
Distribution.—From the eastern base of the Cascade Mountains west of the Pacific, and the Blue Mountains of southeastern Washington. Marginal occurrences listed by [Miller] and [Allen] (1928:49) are Chilliwack River, Lake Wenatchee, and Lyle.
Myotis yumanensis (H. [Allen])
Yuma myotis
Description.—The present species closely resembles Myotis lucifugus and specimens in worn pelage can not be distinguished from that species unless the cleaned skulls are examined. In fresh pelage, yumanensis is duller than lucifugus.
Myotis yumanensis ranges from southern British Columbia to central Mexico west of the Mississippi River. Four races are recognized by [Miller] and [Allen] (1928: 62).
