1918 | Grinnell: A Synopsis of the Bats of California 331 
Description: Head.—Muzzle broad; greatest width of rostrum 
about one-half entire length of head (pl. 16, fig. 8). Nostrils direeted 
obliquely outward and slightly downward, and their rims widely 
diverging, tumid; space between them concave and, in dried skins, 
their openings more than 3 millimeters apart. Ear short, about 18 
millimeters in height from meatus, and broad, only 1 millimeter less 
wide than high; external basal lobe about size of tragus and not 
notched on its anterior border; tragus somewhat triangular in outline 
and about half height of ear from crown. 
LTimbs and Membranes—Wings unusually lone (extent almost 
three times total length of body) and narrow; third metacarpal ex- 
ceeding fifth by at least length of thumb (pl. 16, fig. 7). Wings and 
interfemoral membranes attached at bases of toes. Tip of tail in- 
eluded in interfemoral membrane; tail unusually long, length of 
caudal vertebrae exceeding that of forearm by from 4 to 11 milli- 
meters. 
Pelage.—F ur similar to that of red bat, everywhere full and soft, 
and longest on dorsal surface between shoulders, where from 10 to 
12 millimeters in length. Outer side of ear furred on lower half; a 
strip of hair near anterior edge of ventral surface of ear; a squarish 
patch of hairs on ventral surface of ear in front of apex; basal lobe 
furred on outside. Tragus scantily haired on outer surface. Dorsal 
surface of wings furred as follows: a line of fur, continuous with 
that of body and of dorsal surface of interfemoral membrane, extends 
from ankle along surface of wing to anterior edge of antebrachial 
membrane opposite middle of humerus (pl. 17, fig. 10); along each 
side of radius is a scanty growth of short hairs, averaging less than 
1 millimeter in length, except for oblong patch of longer and denser 
fur on proximal fifth of forearm on edge nearest body. Another 
pateh of fur les at the proximal end of the fifth metacarpal; from 
this a scanty line of hairs extends along sides of metacarpal for one- 
third its length. A third patch of fur lies at base of thumb. On 
ventral surface of wing a line of fur continuous with that of body 
extends from knee joint to distal end of radius, where it fills the 
angles between the finger joints and extends outwardly along inner 
edge of third metacarpal for two-thirds its length. Ventral surface 
of antebrachial membrane furred except at its anterior edge. Dorsal 
surface of interfemoral membrane entirely furred, as also the dorsal 
surfaces of the toes. 
Color.—Dorsal surface of rostrum, all hairs on ears, a band about 
8 millimeters wide extending across throat and uniting ears, and 
fur on under surface of wings, near naples yellow; fur on wings 
nearest body, with brownish base. Sides of muzzle, rims of ears, 
and chin, blackish brown. Hairs on whole back and dorsal surface 
of tail seal brown for about 2 millimeters at bases, then light buff 
for another 2 or 3 millimeters, followed by seal brown for about 1.5 
millimeters, and terminated by a white tipping on the distal end of 
each. Bands of buff are missing from hairs on dorsal surface of tail. 
On ventral surface of body a ruff of hairs, similar to those on 
back, encircles throat just posterior to the band of naples yellow. 
Posterior to this the hairs have bases of light seal brown, and tips 
of light buff. On the dorsal surface of the wing the three small 
patches of fur (2 millimeters in diameter) are pale buff in color. 
