362 University of California Publications in Zoology (Vow. 17 
Nyctinomus cynocephalus californicus, Stone (1904b, p. 587). Record of 
occurrence at Belmont. 
Nyctinomops mohavensis, Stephens (1906, pp. 273-274). Description; 
distribution; habits. 
Nyctinomus mexicanus, Elliot (1907, pp. 523-524). Record of specimens 
taken at Fort Tejon, Palm Springs, and San Jose. 
Nyctinomus mexicanus, J. Grinnell (1913b, p. 283). Range in California. 
Nyctinomus mexicanus, J. Grinnell (1914, p. 268). Occurrence along 
Colorado River. 
Diagnosis —Size medium (total length 90 to 103 millimeters) ; 
ears broad, apparently united at base, with a series of wart-like pro- 
jections on anterior border; tragus small, flattened, squarely truncate 
above; exserted portion of tail about equal to 
that enclosed in membrane; general color, hair 
brown. 
Description: Head.—Ears about as broad as 
long (text-fig. W), diverging from median line on 
tance of 1 millimeter, although usually separate; 
‘ ‘“‘warts’’ on anterior margin of ear varying in 
view of head of . 
REGRGRITO GEE number from five to eleven; a sinuous, sharply de- 
icanus (drawn fined ridge arises from behind tragus and fades 
from specimen no. away toward anterior external portion of lobe; 
18921), X 1.00, hosterior surface of ear marked by five or six 
showing rounded eens ‘ ~ 2 
Reis, SA Se distinet transverse wrinkles; upper lip deeply 
projections on an- crimped, forming perpendicular wrinkles. A deep 
terior margin of furrow under eye. 
Sls) SAE ace: Limbs and Membranes —Wings relatively small 
ee Speed fe and weak (as compared with those of other Cali- 
Arvil perpendicular fornia bats which equal this species in size of 
wrinkles in upper body), slender; third metacarpal 1.7 length of 
lip. fifth metacarpal. Wing attached to tibia on distal 
third. Feet stout with toes distended. 
Pelage.—Dorsal surface of body well furred with short soft hairs 
averaging 3 or 4 millimeters in length. Hairs on ventral surface 
slightly longer and more closely set. On face and chin, in addition 
to shorter hairs, are scattered longer ones varying in length from 5 
to 7 millimeters. Along edge of upper lip is a row of short, stiff, 
downward-directed hairs. Ears very seantily furred with minute 
hairs. Wings naked save for a narrow band of fur, continuous with 
that of body, which extends from middle of humerus alone wing 
to proximal third of femur, on both dorsal and ventral surfaces, and 
for a fringe of hairs which extends along edge of post-calearial lobe 
from its proximal end half way to its distal end. Outer edges of 
first and fifth toes closely fringed with short, curved, white hairs; on 
fifth toe, dorsal to this outer fringe, is a row of less numerous curved 
hairs, three times as long as those of the first row. From upper 
surface of base of each claw spring three or four long curved hairs 
4 to 6 millimeters in length. 
Color.—There is but little individual variation in color among the 
series of Nyctinomus mericanus in the Museum of Vertebrate Zoology. 
Fig. W. Side 
forehead, and sometimes united at bases for a dis- — 
