AMERICAN BATS OF THE GENERA MYOTIS AND PIZONYX 47 



WYOMING: Fremont Peak, 3 skins (U.S.N.M.), approaching carissima; 



Sand Creek, Crook County, 2 skins (U.S.N.M.). 

 YUKON: Yukon River, Caribou Crossing, 1 skin (U.S.N.M.) : Yukon River, 



50 miles below Fort Selkirk, 1 skin (U.S.N.M.). 



Remarhs. — Among the smaller brownish bats of eastern North 

 America Myotls lucifugus lucifugus may usually be at once recog- 

 nized, when in fresh adult pelage, by the long glossy tips to the hairs 

 of the back taken in connection with the presence of the dark shoulder 

 spot and the faintly yellowish belly. Variations in the intensity 

 of the coppery or bronzy tint are found among specimens from any 

 locality in various parts of the eastern United States; but west of 

 the Mississippi, or roughly, west of the ninetieth meridian, the bronzy 

 extreme is almost wholly lacking, the more brassy or " ochraceous- 

 tawny " prevails, and the less intensely colored individuals usually 

 are dull whitish below lacking the buffy tone. 



The typical subspecies has the widest range of any North Ameri- 

 can form of Myotis and it probably penetrates farther north than 

 any other American bat. Here the limits of its distribution seem 

 to correspond roughly with those of the coniferous forest, from 

 southeastern Labrador westward to James Bay, and thence northwest- 

 ward in the interior along the edge of the Barren Grounds nearly to 

 the Arctic Ocean (50 miles from the mouth of the Coppermine 

 River), finally reaching the Yukon Basin and the Pacific coast of 

 the Alaskan Peninsula (Kodiak Island). It intergrades with the 

 darker race alascensis on the coast of southern Alaska and in British 

 Columbia. The western border of its range in Canada probably runs 

 east of the Eocky Mountains to Saskatchewan and Manitoba, thence 

 across the United States through the Dakotas to central Colorado. 

 In the dry interior of the northern United States, as in Colorado, 

 Montana, and Wyoming, it gives place gradually to the paler sub- 

 species carissima. Throughout much of eastern North America 

 Myotis lucifugus lucifugus seems to be the commonest member of 

 the genus. 



MYOTIS LUCIFUGUS ALASCENSIS Miller 



Vespertilio gnjphus lucifugus H. Allen, Monogr. Bats North Amer., BuU. U. S. 

 Nat. Mus., No. 43 (1893), p. 78, March 14, 1894 (part, specimens from 

 Washington). — Trouessakt, Catal. Mamm. viv. foss., p. 131, 1897 (part). 



Myotis lucifugus alascensis MiLLEai, North Amer. Fauna, No. 13, p. 63, Octo- 

 ber 16, 1897. — Elliot, Synops. Mamm. North Amer., Field Columb. Mus., 

 publ. 45, zool. ser., vol. 2, p. 402, March, 1901. — Milleu and Rehn, Proc. 

 Boston Soc. Nat. Hist., vol. 30, p. 256, December 27, 1901.— Trouessabt, 

 Catal. Mamm. viv. foss., suppl., p. 92, 1904. — Elliot, Check List Mamm. North 

 Amer., Field Columb. Mus., publ. 105, zool. ser., vol. 6, p. 479, 1905. — Lyon 

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

 No. 62, p. 270, January 28, 1909.— Seton, Life Hist. Northern Anim., p. 1148, 

 1909.— Miller, List North Amer. Land Mamm. 1911, Bull. U, S. Nat. Mus., 

 No. 79, p. 55, December 31, 1912.— H. W. Gbinnell, Univ. California Publ. 



