256 BULLETIN 57 , UNITED STATES NATIONAL MUSEUM. 
its form more resembling that seen in Erinaceus (except for the 
general outward deflection) than that characteristic of most bats. 
The angular process is also unusually slender, and is flattened ver- 
tically instead of horizontally. External characters in general not 
unlike those of Nyctinomus , but head very noticeably flattened; 
ears slender, wide apart at anterior base, their anterior margin with- 
out horny excrescences, the antitragus very obscurely marked off, 
the keel obsolete, the tragus well developed, not peculiar ; lips slightly 
Fig. 45.— Eumops californicus. Tucson, Arizona. No. 88451. x 2. 
expanded and obscurely wrinkled, thickly set throughout, though 
especially above, with very short, stiff modified hairs; nostril pad 
obsolete; dorsal surface of forearm and of third metacarpal thickly 
sprinkled with minute warty excrescences, a few of which are also 
present on thumb. 
Species examined. — Platymops macmillani Thomas. 
Remarks. — Though not distantly related to Nyctinomus this genus 
is readily distinguishable by the flattened head, the roughened fore- 
arm, and the peculiarities of the skull and teeth. 
