AMERICAN BATS OF THE GENERA MYOTIS AND PIZONYX 159 



that one of the specimens included under it (Cape St. Lucas) is refer- 

 able to true Myotis calif or^iicits, we prefer to consider the name a 

 synonym of ccdifomicus as has already been done by Miller (1897). 



MYOTIS CALIFOKNICUS MEXICANUS (SauBsure) 



Vespertilio mexicanus Saussube, Rev. et Mag. de Zool., ser. 2, vol. 12, p. 282, 

 1860. 



Vespertilio nigricans Alston, Biol. Centr.-Amer., Mammalia, p. 206, 1881 (not 

 of Wied). 



Vespertilio agilis H. Allejn, Proc. Acad. Nat. Sci. Philadelphia, 1866, p. 282 

 (Mirador, Vera Cruz, Mexico). — Lyon and Osgood, List Type-Sp. Mamm. 

 U. S. Nat. Mus., Bull. U. S. Nat. Mus., No. 62, p. 290, January 28, 1909. 



Vespertilio nitidus J. A. Allen, Bull. Amer. Mus. Nat. Hist., vol. 3, p. 177, 

 December 10, 1890. 



Myotis califomicus mexicanus Millee, North Amer. Fauna, No. 13, p. 73, 

 October 16, 1897. — Miller and Rehn, Proc. Boston Soc. Nat, Hist., vol. 30, 

 p. 257, December 27, 1901. — Elliot, Land and Sea Mamm. Middle Amer., 

 Field Columb. Mus., publ. 95, zool. ser., vol. 4, p. 579, 1904. — Tbouessabt, 

 Catal. Mamm. viv. foss., suppl., p. 93, 1904. — Elliot, Check List Mamm. 

 North Amer., Field Columb. Mus., publ. 105, zool. ser., vol. 6, p. 477, 1905. — 

 J. A. Allen, Bull. Amer. Mus. Nat. Hist., vol. 22, p. 260, July 25, 1906.— 

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

 79, p. 57, December 31, 1912; List North Amer. Recent Mamm. 1923, Bull. 

 U. S. Nat. Mus., No. 128, p. 71, April 29, 1924. 



Myotis nigricans J. A. Allen, Bull. Amer. Mus. Nat. Hist., vol. 22, p. 260, 

 July 25, 1906 (not of Wied; specimens from Jalisco). — Nexson, North 

 Amer. Fauna, No. 14, p. 18, April 29, 1899 (not of Wied; specimen from 

 Tres Marias Islands). 



Type locality. — Exact locality unknown, but the type specimen 

 was collected somewhere in the warmer part of the State of Mexico. 

 Saussure says of the animal : " Habite les parties chaudes du Mexique. 

 J'ai pris ce Vespertilion dans les terres chaudes de la province de 

 Mexico." 



Type specimen. — The description was based on an alcoholic speci- 

 men collected by H. de Saussure. If still in existence it is probably 

 in the Museum of Natural History at Geneva, Switzerland, where 

 most of Saussure's Mexican material is preserved. 



Distribution. — Southern Mexico, from Oaxaca north to about the 

 Tropic of Cancer. (See map 11, p. 149.) 



Diagnosis. — Slightly larger than typical Myotis coliformcus; gen- 

 eral color tending toward a dull orange brown rather than chestnut ; 

 tail less elongated than in the other races, its ratio to head and body 

 averaging about 90. 



Color. — There is a tendency to dichromatism in this race. In the 

 darker phase the general color is dull brown, of much the same shade 

 as in Myotis lucifugus., nearly "Brussels brown" (Ridgway, 1912), 

 slightly darker on the head; below, the chin, throat, and chest are 



