158 BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



bases of the hairs are "plumbeous black." Ears and membranes 

 pale brownish, the interfemoral very pale at the base. 



Measurements. — The measurements of the type were : Total length, 

 80 mm.; tail, 42; tibia, 15; ear, 11; forearm, 30; expanse of wings, 

 208. A topotype measured by the describer: Total length, 81; tail, 

 39; ear, 12; expanse, 221; its forearm is 31.5; knee to end of claw, 

 foot extended, 20. For detailed measurements, see tables, pages 161 

 and 164. 



Speciviens examined. — Total number 108, from the following 

 localities : 



ARIZONA: Beale Spring, 2 ale. (U.S.N.M.) ; Big Sandy Creek, 1 ale. 

 (U.S.N.M.) ; Bill Williams River, 5 ale. (U.S.N.M.) ; Colorado River, 

 Mellen, 2 skins (U. C.) ; Fort Defiance, 1 ale. (U.S.N.M.) ; Fort Verde, 

 1 ale. (A. M. N. H.) ; Keam Canyon, 1 skin (U.S.N.M.) ; San Francisco 

 Mountain, 1 skin (U. C.) ; Santa Catalina Mills. 2 ale. (A. M. N. H.) ; 

 ■ Tinajas Altas, Yuma County, 3 skins (U.S.N.M.) ; Yuma, 2 ale. (U.S.N.M.). 



CALIFORNIA: Imperial County: Colorado Desert, 1 ale. (U.S.N.M.) ; Fort 

 Yuma, 1 ale. (U.S.N.M.) ; Pilot Knob, 3 skins (U.S.N.M.) ; Inyo County: 

 Amargosa River, 1 ale. (U.S.N.M.) ; Bennett's Wells, 1 ale. (U.S.N.M.) ; 

 Death Valley, no exact locality, 10 ale. (U.S.N.M.) ; Funeral Mountains, 

 1 ale. (U.S.N.M.) ; Furnace Creek Ranch, 2 skins (U. C.) ; Lone Pine 

 Creek, 1 skin (U. C.) ; Saratoga Springs, 6 ale. (U.S.N.M.) ; Mesquite 

 Valley, 2 skins (F. M.) ; Pauamint Mountains, 4 skins (F. M.) ; Panamint 

 Valley, 1 skin (U. C.) ; San Bernardino County: La vie, 2 skins (U. C.) ; 

 opposite Needles, 2 skins (U. C.) ; San Diego County : No exact locality, 3 

 ale. (U.S.N.M.) ; Borego Spring, 1 skin (U.S.N.M.) ; Colorado Desert, 1 

 ale. (U.S.N.M.) ; La Puerta Valley, 4 skins (U. C.) ; Valleeito, 4 skins 

 (U. C). 



COLORADO : Ashbaugh's Ranch, Montezuma County, 1 skin, 2 ale. 

 (U.S.N.M.). 



LOWER CALIFORNIA: San Simon, 2 skins (A. M. N. H.) ; ?San Pedro 

 Martir Mountains, 20 ale. (A. M. N. H.). 



NEVADA: Colorado River, 1 ale, (U.S.N.M.); Cottonwood Range, Hum- 

 boldt County, 2 ale. (U.S.N.M.) ; Gold Mountain, 2 ale. (U.S.N.M.) ; 

 Little High Rock Canyon, Washoe County, 2 skins (U. C.) ; Pahrump 

 Valley, 1 ale. (U.S.N.M.) ; Rabbit Hole Mountains, 1 skin (U.S.N.M.) ; 

 Vegas Valley, 1 ale. (U.S.N.M.). 



UTAH: Kanab, 1 skin (U.S.N.M.). 



Remarks. — In typical specimens of Myotis calif omicvs pcMidns the 

 tricolor pattern of the dorsal fur is a striking characteristic due to 

 the extent of the pale ring on the individual hairs, whose ends are 

 reddish as in true califoriiicus rather than golden as in M. c. 

 mexicamis. Many intermediates occur where the forms meet. 



It may be questioned whether the name Vespertilio oregonensis 

 H. Allen is not applicable to this race. This name was given in a 

 somewhat ambiguous way to a skin without locality, two skins from 

 Yuma, Arizona, and one from Cape St. Lucas, Lower California. In 

 view of the vague manner in which it was published and the fact 



