48 BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



Zool., vol. 17, p. 267, January 31, 1918. — J. Geinnexl, Univ. California Publ. 

 Zool., vol. 21, p. 314, January 27, 1923. — Miller, List North Amer. Recent 

 Mamm. 1923, Bull. U. S. Nat. Mus.. No. 128, p. 69, April 29, 1924. 



Myotis yumanensis saturatus Osgood, North Amer. Fauna, No. 21, p. 36, Sep- 

 tember 26, 1901 (not of Miller, 1897; see H. W. Gbinnell, Univ. Calif. 

 Publ. Zool., vol. 17, p. 432, April 25, 1918). 



Myotis pernox Hollister, Smithsonian Misc. Coll., vol. 56, No. 26, p. 4, December 

 5, 1911 (Henry House, Alberta, Canada). — Miller, List North Amer. Land 

 Mamm. 1911, Bull. U. S. Nat. Mus., No. 79, p. 56, December 31, 1912.— Eluot, 

 Check List Mamm. North Amer., suppl., p. 155, 1917. — Miller, List North 

 Amer. Recent Mamm. 1923, Bull. U. S. Nat. Mus., No. 128, p. 69, April 

 29, 1924. 



Type locality. — Sitka, Alaska. 



Type specimen. — Adult female, in alcohol. No. 77416, United 

 States National Museum (Biological Survey collection), collected at 

 Sitka, Alaska, August 5, 1895, by Clark P. Streator. Original 

 number 4754. 



Distribution. — Moist coastal region of western North America, 

 from the archipelago of southern Alaska south through British 

 Columbia and thence southeastward following the saturate area into 

 northeastern Washington (Blue Mountains) and extreme western 

 Montana, and again coastwise across western Washington and Oregon 

 to the northwest coastal strip of California (Humboldt County). 



To the north and west of this area intergradation takes place with 

 Myotis lucifugus lucifugus which occurs in nearly typical form on 

 Kodiak Island and in the interior of Alaska. In the dry lowlands 

 of eastern Washington and Oregon, that is, to the east of the coast 

 ranges that serve to withdraw much of the atmospheric moisture 

 -coming from the Pacific Ocean, the transition is fairly rapid to the 

 much j^aler M. lucifugus carissivia. A similar transition to carissima 

 is seen from the Mount Shasta region of northern California, east- 

 ivard and southward to the edge of the Great Basin. 



Diagnosis. — A dark, " saturate " race ; size as in typical Myotis 

 lucifugus. 



Description. — Similar to typical Myotis lucifugus but the general 

 color and especially the under-fur is so darkened that the whole 

 appearance is sooty with inconspicuous dark bronzy gloss on the back. 

 The fur of the upperparts is everywhere blackish at the base becom- 

 ing dark brown subterminally with a mahogany cast, nearly "light 

 seal brown" of Ridgway (1912). The extreme tips of the long 

 hairs are glossy, reflecting the light in such a way as to give the 

 impression, especially when the hair is disarranged, of bronzy streaks. 

 The shoulder spot is without these glossy tips but is not otherwise 

 different from the rest of the body in color. Below, the tips of the 

 hairs are darker buff than in the typical form, with a distinct brown- 

 ish cast especially on throat and chest; in some Alaskan specimens 



