=Myotis lucifugus carissima= Thomas _Myotis (Leuconoë) carissima_ Thomas, Ann. and Mag. Nat. Hist., 13 (ser. 7): 383, May, 1904. _Myotis lucifugus carissima_ Cary, N. Amer. Fauna, 42:43, October 3, 1917. _Type._--Obtained at Yellowstone Lake, Yellowstone National Park, Wyoming by J. Darling in September, 1903; type in British Museum. _Racial characters._--Color pale, rather "brassy" in tone; distal border of interfemoral membrane paler than proximal part. _Measurements._--Four specimens from eastern Washington average: total length 77; length of tail 33; hind foot 11; ear 13; height of tragus 7.3. _Distribution._--East of the eastern base of the Cascade Mountains, save for the Blue Mountains of southeastern Washington. Western records are Stehekin (Miller and Allen, 1928: 52) and Vantage (W. W. D.) =Myotis lucifugus alascensis= Miller _Myotis lucifugus alascensis_ Miller, N. Amer. Fauna, 13:63, October 16, 1897. _Vespertilio gryphus lucifugus_ Allen, U. S. Nat. Mus. Bull., 43:78, March 14, 1894 (part specimens from Washington). _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). [Illustration: FIG. 34. Distribution of the Yuma myotis in Washington. A. _Myotis yumanensis saturatus._ B. _Myotis yumanensis sociabilis._] The habits of _Myotis yumanensis_ and _Myotis lucifugus_ appear to be the same. In Washington the two species are commonly found together. In western Washington, _Myotis yumanensis_ seems to be more common than _Myotis lucifugus_. In the San Juan Islands a _yumanensis_ was found hiding in the attic of an old cabin on Blakeley Island. A specimen of long-eared bat was taken at the same place. Another Yuma myotis was caught behind a door of a mill on Blakeley Island (Dalquest, 1940: 4).