lUOl.] NATUKAL SCIENCES OF PHILADELPHIA. tU^ 



In Miller's monograph, above cited, all the California Eptesicus 

 examined by him are classed under fuscuf<. A specimen in the 

 author's collection from the San Bernardino Valley, near San Ber- 

 nardino, indicates a phase of coloration separating it from typical 

 fuseas, in a manner such as might be reasonably predicted by any 

 one having a knowledge of the climatic effect of this locality upon 

 other mammals thus living on the outskirts of the Mojave Desert 

 region. It is quite probable that Mr. Ilerron collected this speci- 

 men on his ranch, a few miles west of San Bei*nardino, or in one 

 of his eastern trips into the edge of the desert. The exact locality 

 is not stated on the label. The specimen may be thus charac- 

 terized : 



Eptesicus fuscus bernardiniis subsp. nova. 



Type No. 1,247, ad. d". Coll. of S. N. Khoads. Taken by R. 

 B. Herron, May 26, 1893, in the "San Bernardino Valley" 

 (near San Bernardino), Cal. 



Description. — Size and cranial characters as in Eptesicus fuscus 

 typicus. 



Color. — Pallid bistre above, brownish drab below; the hairs 

 below being unicolor nearly to their roots, and those above darken- 

 ing slightly only in the basilar fourth of their length. In fuscn^s 

 the upper body hairs are darkly sooty for more than half their 

 basilar length, the brown tips not concealing the dark under-fur. 

 Wing membranes and ears in bernardinus very dark- 



Measurements of type: Total length 114 mm,; tail 51 mm.; 

 •hind foot ?; alar extent 304 mm. These measurements were 

 made by the collector before skinning the s])ecimen. 



A series of four specimens from the same collector taken in 

 the "San Bernardino Mts." in September, 1893, shows that the 

 mountain form is inseparable from fuscus ; one of these, however, is 

 a perfect intergrade. Bernardinus differs from peninsular, O. 

 Thomas, from southern Lower California, in its large size ; penin- 

 -sulce appearing to be a distinct species. 



