50 BULLETIISr 144, UNITED STATES NATIONAL MUSEUM 



served as the type of Myotis pemox Hollister. Until there is evi- 

 dence that they represent a form with a definite range, it now seems 

 most satisfactory to regard these specimens as large individuals of 

 the present race, showing intergradation toward tnie Myotis luci- 

 fugus. Two specimens taken in Bitter Root Valley, western Mon- 

 tana (Corvallis), are similarly dark, while a third (No. 160181, 

 U.S.N.M.), also from Corvallis, is a typical carissima in color. Their 

 size is normal. Seven skins from Oregon (Bend, 3; Blue River, 1; 

 Lapine, 1; McKenzie Bridge, 2) present some of the same peculiari- 

 ties. Five of them are indistinguishable from true Myotis lucifugus^ 

 two (one from Lapine and one from McKenzie Bridge) are darker. 

 None of them shows an increase in size. One skin from Donner, Calif. 

 (No. 100377, U.S.N.M.), is like eastern lucifugus^ while two others 

 have the color characteristic of M. I. carissima. Whether the western 

 specimens indistinguishable in color from true Myotis lucifugus 

 should be regarded as indicating that the range of the typical sub- 

 species actually extends southward along the mountains between the 

 areas occupied by the races carissima and alascensis^ or whether they 

 are best explained as intermediates between the two western races 

 is a question which can not now be answered. The second alterna- 

 tive, however, appears to be the more probable. 



MYOTIS LUCIFUGUS CARISSIMA Thomas 



Myotis yumanensis saturatus Merkiam, North Amer. Fauna, No. 16, p. 89, 



October 28, 1899 (not of Miller, 1897). — Stephens, California Mammals, p. 



267, 1906 (part).— J. Grinnell, Proc. California Acad. Sci., ser. 4, vol. 3, 



p. 277, August 28, 1913 (part). 

 Ml/Otis yumanensis Rehn, Proc. Acad. Nat. Sci. Philadelphia, 1904, p. 590 (not 



of H. Allen, 1864). 

 Myotis (Leuconoc) carissima Thomas, Ann. and Mag. Nat. Hist., ser. 7, vol. 



13, p. 383. May, 1904. 

 Myotis carissima Miller, List North Amer. Land Mamm. 1911. Bull. U. S. Nat. 



Mus., No. 79, p. 56. December 31, 1912. — Elliot, Check-list Mamm. North 



Amer., suppl., p. 154, 1917. — Miller, List North Amer. Recent Mamm. 1923, 



Bull. U. S. Nat. Mus., No. 128, p. 70, April 29, 1924. 

 Myotis yumanensis altipetens H. W. Grinnell, Univ. California Publ. Zool., 



vol. 17, p. 9, August 23, 1916 (Merced Lake, Yosemite Park, California). 

 Myotis lucifugus canssi>tna Gary, North Amer. Fauna, No. 42, p. 43. 1917 



(Colorado). — Bailey, North Amer. Fauna, No. 49 [December^ 1926], p. 



215, January 8, 1927 (North Dakota). 

 Myotis lucifugus altipetens H. W. Grinne3.l, Univ. California Publ. Zool.. vol. 



17, p. 263, January 31, 1918. — J. Grinnell, Univ. California Publ. Zool., 



vol. 21, p. 214, January 27, 1923. — Miller, List North Amer. Recent Mamm. 



1923, Bull. U. S. Nat. Mus., No. 128, p. 70, April 29, 1924.— Grinnell and 



Storer, Anim. Life in the Yosemite, p. 55, 1924. 

 Myotis albicinctus G. M. Allen, Jour. Mamm., vol. 1, p. 2, November 28, 1919 



(Mt. Whitney, California). — Miller, List North Amer. Recent Mamm. 



1923, Bull. U. S. Nat. Mus., No. 128, p. 68, April 29. 1924. 



