70 BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



volans and M. lucifugus, in which there is a saturate dark form con- 

 fined to the humid northwest coast, a pallid race characteristic of the 

 hot arid interior and an intermediate form covering a wide area be- 

 tween. The present race is usually distinguishable at a glance from 

 Myotis yumamensis saturatus by its brownish ears and membranes 

 and lighter brown fur, and from the typical yummiensis by its dull 

 brown instead of pale buffy color. In a series from western Montana 

 (Corvallis) the forearm is unusually long, 20 specimens averaging 

 35.5, with extreme as high as 36.7. In M. htcifugtts from the same 

 place, the forearm is 39 mm. Specimens from Shasta and Siskiyou 

 Counties, Calif., are so perfectly intermediate between socidbilis and 

 saturatus that they might be equally well placed under either form. 

 The more exact definition of the eastward range and the determina- 

 tion of the area of intergradation with the typical subspecies are yet 

 to be worked out in detail. 



MYOTIS YUMANENSIS SATURATUS Miller 



Myotis yumanensis saturatus Miller, North Amer. Fauna, No. 13, p. 68, October 

 16, 1897. — Trouessart, Catal. Mamm. viv. foss., p. 1283, 1899. — Elliot, Field 

 Columb. Mus., publ. 32, zool. ser., vol. 1, p. 276, March. 1899 ; Synops. Mamm. 

 North Amer., Field Columb. Mus., publ. 45, zool. ser., vol. 2, p. 403, March, 

 1901 ; List Land and Sea Mamm. North Amer., Field Columb. Mus., publ. 

 57, zool. ser., vol. 2, p. 517, June, 1901. — Miller and Rehn, Proc. Boston 

 Soc. Nat. Hist., vol. 30, p. 256, December 27, 1901.— Trouessart, Catal. 

 Mamm. viv. foss., suppl., p. 93, 1904. — Elliot, Check List Mamm. North 

 Amer., Field Columb. Mus., publ. 105, zool. ser., vol. 6, p. 475, 1905. — 

 Stephens, California Mammals, p. 267, 1906. — Elliot, Catal. Mamm. Field 

 Columb. Mus., Field Columb. Mus., publ. 115, zool. ser., vol. 8, p. 502, 1907. — 

 Lyon and Osgood, List Type-Sp. Mamm. U. S. Nat. Mus., Bull. U. S. Nat. 

 Mus., No. 62, p. 273, January 28, 1909. — Miller, List North Amer. Land 

 Mamm. 1911, Bull. U. S. Nat. Mus., No. 19, p. 56, December 31, 1912.— J. 

 Grinnell, Proc. California Acad. Sci., ser. 4, vol. 3, p. 277, August 28, 1913 

 (part). — H. W. Grinnell, Univ. California Publ. Zool., vol. 17, p. 278, Jan- 

 uary 31, 1918. — G. M. Allen, Journ. Mamm., vol. 1, p. 1, November 

 29, 1919.— Miller, List North Amer. Recent Mamm. 1923, Bull. U. S. 

 Nat. Mus., No. 128, p. 70, April 29, 1924. 



Type locality. — Hamilton, Skagit County, Wash. 



Type specimen. — Adult male, skin and skull No. ^|fg| United 

 States National Museum (Biological Survey collection), collected at 

 Hamilton, Skagit County, Wash., September 13, 1889, by T. S. 

 Palmer. Original number 392. 



Distribution. — Humid northwest coast from southern British 

 Columbia south to south-central California (San Luis Obispo County) 

 and to a varying distance inland west of the higher mountains. 



Diagnosis. — Like Myotis ywnanensis yumanensis and M. y. soci- 

 ahilis but color much darker. 



