280 University of California Publications in Zoology [Vou.17 
Vespertilio nitidus, H. Allen (1864, pp. 60-62, fig. 57-59), part. Deserip- 
tion; distribution. 
V [espertilio]. nitidus, Cooper (in Cronise, 1868, p. 442). Listed as oceur- 
ring in California. 
V [espertilio]. obscurus, Cooper (in Cronise, 1868, p. 422)(?). Listed as 
oceurring in California. 
Vespertilio nitidus, Dobson (1878, pp. 318-319, pl. 29, fig. 7), part. De- 
scription; general distribution (includes ‘‘California’’). 
Vespertilio nitidus, H. Allen (1894, pp. 94-104, pl. 12), part. Desecrip- 
tion; distribution. 
Myotis californicus, Miller (1897b, pp. 69-72), part. Description; dis- 
tribution. 
Myotis californicus, Merriam (1899, p. 89). Occurrence on Mt. Shasta. 
Myotis californicus caurinus, Stone (1904a, p. 579). Record of occurrence 
on Mt. Sanhedrin. 
Myotis californicus, Elliot (1901, pp. 403-404), part. 
tribution. 
Myotis californicus, Elliot (1904b, pp. 578-579). Diagnosis; distribution. 
Myotis californicus, Stephens (1906, p. 266), part. Diagnosis; distribution ; 
habits. 
Myotis californicus, Miller (1912, p. 56), part. Range. 
Myotis californicus, J. Grinnell (1913b, p. 277), part. Distribution in 
California. 
Diagnosis; dis- 
Diagnosis —Total length, 74 to 83 millimeters ; forearm, 30 to°31.6; 
foot weak, slender, and less than half leneth of tibia; calear about 
as lone as free edge of interfemoral membrane, very slender, edge 
ss with a distinct keel, lobed at tip. Free 
\ border of uropatagium naked. Ears 
AS) aC oe >) 
L 
Fig. K. Side view of head 
of Myotis californicus califor- 
nicus (drawn from specimen 
no. 21875), X 1.00, showing 
erect and acutely pointed tra- 
gus. 
Fig. L. Side view of head 
of Pipistrellus hesperus hes- 
perus (drawn from specimen 
no. 10772), X 1.00, showing 
reaching just beyond tip of nose. 
Tragus pointed at tip and directed 
upward, not forward (see text-fig. K). 
Wing membrane attached at bases of 
toes. Fur on back distinetly darker at 
base than at tip; general color of back 
mummy brown. (See pl. 18, fig. 17). 
Description: Head.—Kar moderately 
long for the genus (12 to 14 millimeters 
in height from meatus), and when laid 
forward reaching from 1 to 3 miulli- 
meters beyond tip of nose. Anterior 
border of auricle straight or slightly 
curved tragus with blunt tip. 
convex at base, then strongly convex to 
a pot somewhat beyond middle, thence straight or even a little con- 
cave to rounded tip; posterior border coneave from tip to a point 
slightly below middle, thence convex to basal notch; basal lobe 
strongly developed and notched on its lower border. Tragus straight 
and tapering, slightly more than half height of ear (text-fig. K). 
Limbs and Membrancs.—All membranes thin and delicate. Wings 
attached at bases of toes. Feet small and weak, and usually less 
than half length of tibia. Calear slender and usually terminating 
in a distinct lobe; posterior border provided with a keel. 
