AMERICAN BATS OF THE GENERA MYOTIS AND PIZONYX 145 



side. The other small premolar nearly fills the space between canine 

 and p*. 



MYOTIS VOLANS AMOTUS MUler 



Myotis lucifugus longicrus Miller, North Amer. Fanua, No. 13, p. 65, October 



16, 1897 (part; specimen from Vera Cruz). 

 Mi/Otis longicrus amotus Milleb, Proc. Biol. Soc. Washington, vol. 27, p. 212, 

 October 31, 1914 ; List North Amer. Recent Mamm. 1923, Bull. U. S. Nat. 



Mus., No. 128, p. 69, April 29, 1924. 



Type locality. — Cofre de Perote, Vera Cruz, Mexico. Altitude 

 12,500 feet. 



Type specimen. — Adult female, skin and skull, No. 54437, United 

 States National Museum, from Cofre de Perote, Vera Cruz, Mexico. 

 Collected May 27, 1893, by E. W. Nelson. 



Distrihufion. — Southern Mexico, including the States of Vera Cruz 

 and Jalisco; limits of range as yet undetermined. (See map 10, 

 p. 136). 



Diagnosis. — Similar in size and general coloration to the race 

 interior., but the tints of back and belly much richer in tone. 



Color. — The color of the fur is nearly " ochraceous tawny " above, 

 and " cinnamon brown " below even to the fur about the anal region 

 which in M. v. interior is usually whitish. 



Skull. — The skull of the type seems a trifle longer with a narrower 

 brain case and longer rostrum than in specimens of M. v. lonfficms, 

 while from typical volans it differs in larger size and less shortened 

 rostrum. 



Measurements. — For measurements see tables, pages 146 and 148. 



Specimens examined. — Total number 3, from the following locali- 

 ties: 



JALISCO: Los Masos, 2 skins (A. M. N. H.). 



VERA CRUZ: Cofre de Perote, 1 skin, the type (U. S. N. M.). 



Remarks. — This Mexican form of Myotis volans is of a richer tone 

 throughout than those whose ranges lie immediately to the north, 

 but it is not darkened to the extent seen in Myotis volnns longicrus of 

 the humid northwest coast. The pecularities in color were noticed 

 by Miller (1897) in his review of the North American Vespertilionidse, 

 but the race was not formally separated until 1914. Specimens from 

 northern Chihuahua and Sonora, Mexico, although approaching 

 Myotis volans amotus., seem to be best referred to M. v. intenor which 

 they resemble in the golden hue of the long glossy tips of the hairs 

 above, and in the paler color below, becoming whitish or buffy about 

 the anal region. 



