AMERICAN BATS OF THE GENERA MYOTIS AND PIZONYX 127 



Diagnosis. — General color a pale yellowish brown. 

 Color. — Upper parts a uniform "warm buff" (Kidgway, 1912), 

 the tips of the hairs slightly shining ; basally the hairs are " fuscous 

 black" and a small area of this color is sometimes present at the 

 shoulder. Below, the general tone is dull whitish due to the fuscous- 

 black bases of the hairs showing through the buffy white tips. Along 

 a narrow strip at the sides of the abdomen the hairs are whitish to the 

 roots. 



Measurements. — For measurements see tables, pages 128 to 130. 

 Spedmens examined. — Total number 193, from the following 

 localities : 



ARIZONA: Beale's Spring, 1 ale. (U.S.N.M.) ; Flagstaff, 1 ale. 



(A. M. N. H.) ; Springerville, 1 skull (U.S.N.M.). 

 CALIFORNIA: Old Fort Tejon, 14 ale., including type (U.S.N.M.); 



Walker Pass, 1 ale. (U.S.N.M.). 

 CHIHUAHUA: San Luis Mountains, 2 skins (U.S.N.M.). 

 JALISCO: La Laguua, 1 skin (U.S.N.M.), not typical; Los Masos, 7 skins 



(A. M. N. H.), not typical. 

 MICHOACAN: Patzeuaro, 2 skins, not typical. 2 ale. (U.S.N.M.). 

 MISSOURI: St. Louis, 1 ale. (U.S.N.M.). 



NEW MEXICO: Carlsbad, 1 ale. (U.S.N.M.) ; Cloverdale, Grant County, 18 

 skins, 65 ale. (U.S.N.M.) ; Copperton, Valencia County, 1 skin (U.S.N.M.) ; 

 Espanola, 1 ale. (U.S.N.M.) ; Gallup, McKinley County, 1 skin (U.S.N.M.) ; 

 Mesa Jumanes, 3 skins (U.S.N.M.) ; "Mountains of New Mexico," 1 skin 

 (U.S.N.M.) ; Sacramento Mountains, Otero County, 1 ale. (A. N. S. P.). 

 SAN LUIS POTOSI: Hacienda La Parada, 6 skins, 56 ale. (U.S.N.M.); 



1 ale. (B. M.). 

 WASHINGTON: Anatone, Asotin County, 1 skin (U.S.N.M.). 

 ZACATECAS: Hacienda San Juan Capistrano, 1 skin, 3 ale. (U.S.N.M.). 



Reinarks. — It seems characteristic of Myotis thysanodes thysanodes 

 to be found somewhat sporadically. In California the animal has 

 been recorded from only five localities, Dulzura, San Diego County 

 (Miller, 1897), Fyffe and Limekiln, El Dorado County (H. W. 

 Grinnell, 1918), Old Fort Tejon, Kern County, and Walker Pass, 

 Kern County. Yet its range may be expected to include most of the 

 austral zone area of the State. A single individual has been taken 

 in Asotin County, southeastern Washington, but the species has ap- 

 parently not yet been detected in Oregon or Nevada. An alcoholic 

 specimen in the United States National Museum (No. 3W/5 ); re- 

 ceived many years ago (catalogued in 1861), is labeled: " St. Louis, 

 Missouri, Dr. Engleman." If there is no mistake about this record, 

 St. Louis marks the extreme known eastward limit of the animal's 

 range. 



In northern and central Mexico the color becomes gradually 

 darker, so that specimens from San Luis Potosi and Zacatecas are 

 practically intermediate between the typical form and the southern 

 race. Five specimens from San Luis Potosi, Mexico, are not typical. 



