AMEKICAISr BATS OF THE GENEKA MYOTIS AND PIZONYX 139 



luGifugtis, but in 1914 he showed that it is distinct. Four subspecies 

 are noAv recognized. 



MYOTIS VOLANS VOLANS (H. Allen) 



Vespertilio volans H. Allen, Froc. Acad. Nat. Sci. Philadelphia, 186G, p. 282. — 

 DoBsoN, Catal. Chiroptera Brit. Mus., p. 329, 1878. — H. Allen, Monogr. Bats 

 North Amer., Bull. U. S. Nat. Mus., No. 43 (1893), p. 94, March 14, 1894 (as 

 synonym of "Vespertilio nitidus "=^ calif omicus). — MiLLsat, North Amer. 

 Fanua, No. 13, p. 69, October 16, 1897 (as synonym of Myotls calif ornicus) . — • 

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

 Mus., No. 62, p. 273, January 28, 1909. 



Myotis capitaneus Nelson and Goldman, Proc. Biol. Soc. Washington, vol. 22, 

 p. 28, Marchi 10, 1909 (San Jorge, near Comondu, Lower California). — 

 MiLLEB, List North Amer. Land Mamm. 1911, Bull. U. S. Nat. Mus., No. 79, 

 p. 56, December 31, 1912. — Goldman, Proc. Biol. Soc. "Washington, vol. 27, 

 p. 102, May 11, 1914. 



Myotis volans Goldman, Proc. Biol. Soc. Washington, vol. 27, p. 102, May 11, 

 1914.— MiLLEB, List North Amer. Recent Mamm. 1923, Bull. U. S. Nat. Mus., 

 No. 128, p. 71, April 29, 1924. 



Type locality. — Cape St. Lucas, Lower California, Mexico. 



Type specimen. — Adult female in alcohol, No. 5398, United States 

 National Museum, collected at Cape St. Lucas, Lower California, 

 Mexico, by John Xantus. According to Lyon and Osgood, in 1909, 

 the alcoholic portion of the type could not then be found ; it appears, 

 however, to be in the Academy of Natural Sciences at Philadelphia. 



Distribution. — So far as known the typical form is confined to 

 Lower California. (See map 10, p. 136.) 



Diagnosis. — Size smallest of the races, forearm about 35 mm., tibia 

 17. Skull delicately formed, distinctly smaller than in the other 

 subspecies, its greatest length less than 13 mm. 



Description. — Color above a clear reddish buff — about " clay color " 

 of Ridgway with a tinge of cinnamon — slightly paler on the head and 

 neck; below dull whitish washed with buffy; the bases of the hairs 

 both above and below plumbeous black, except ventrally along the 

 borders of the membranes where the dark bases are lacking. Tips of 

 the hairs above only slightly glossy ; membranes dark blackish brown. 

 There is no dark spot at the shoulder. 



In color the only available skin (type of Myotis capitaneus) differs 

 very little if at all from the type of the race interior, which, however, 

 is the brightest of the series representing that subspecies. 



Measurements. — ^For measurements see tables, pages 146 and 147. 



Specimens examined. — Total number 6, from the following 



localities : 



LOWER CALIFORNIA: Cape St. Lucas, 1 skull, type (U.S.N.M.), 1 ale. 

 without skull, type (A.N.S.P.) ; San Jorge, 1 skin, type of capitaneus 

 (U.S.N.M.) ; Santa Anita, 4 ale, all but one immature (U.S.N.M.). 



