298 University of California Publications in Zoology {(Vou.17 
Color.—As all the adult examples at hand are alcoholic the follow- 
ing color description is taken from Miller (1897b, p. 81) : 
The fur is everywhere light, dull, yellowish brown, distinctly paler ventrally, 
the hairs everywhere dusky slate at base. The color is subject to considerable 
individual variation in shade. The palest specimens are yellowish wood brown 
inclining to clay color; the darkest specimens dull raw umber. The belly varies 
from clear gray scarcely tinged with yellow to a strong yellowish gray, and in 
other specimens to dull brownish gray. The exact shades are very variable and 
impossible to describe accurately. 
Skull—About 16 millimeters long, thus about equal to that of 
Myotis velifer in total length, but quite distinct in general appearance 
(pl. 21, fig. 35, and pl. 22, fig. 47). Rostral portion of skull relatively 
slender (the diameter of rostrum, taken just posterior to the canines, 
averaging a millimeter less in thysanodes than in velifer). Sagittal 
crest well-defined in velifer, but indistinct in thysanodes. As pointed 
out by Miller (1897b, p. 82) the posterior margin of the brain-case, 
when viewed from above, is rounded in thysanodes, squarish, or 
truneate, in velifer. 
Measurements.—Miller (1897), p. 83) gives the average measure- 
ments of a series of ten specimens of Myotis thysanodes from Fort 
Tejon as follows: Total length, 87.0 millimeters; tail vertebrae, 37.0; 
tibia, 17.6; foot, 8.0; forearm, 41.2; thumb, 6.3; longest finger, 69.2; 
ear from meatus, 17.6; width of ear, 11.8; tragus, 10.5. 
Synonymy and History.—This bat was described by Miller (1897), 
pp. 80-85) under the name Myotis thysanodes. The type specimen 
was obtained at Fort Tejon. Miller states that specimens of the 
fringed bat were variously labeled or listed in his monographs by 
H. Allen as ‘‘V[espertilio]. albescens velifer,’’ *‘V. subulatus,’’ “‘V. 
albescens?,’’ and ‘‘V. albescens evotis.’’ 
Distribution —Given by Miller (1912, p. 59) as the Lower Sonoran 
zone from near the southern border of the United States south to San 
Luis Potosi and Michoacan, Mexico. The only Californian localities 
of capture known to the writer besides those given by Miller (Fort 
Tejon, Kern County, and Dulzura, San Diego County), are Limekiln 
and Fyffe, Eldorado County. These four localities are all but one 
well within the Upper Sonoran life-zone; Fyffe is in Transition. (See 
map, text-fig. N.) 
Specimens Examined.—Total number, 7, from the following locali- 
ties in California: Kern County: Fort Tejon, 5 aleoholies (U. 8. Biol. 
Surv.) ; Eldorado County: Limekiln, 1 (no. 24206, Mus. Vert. Zool., 
August 2, 1916) ; Fyffe, 1 (no. 24186, Mus. Vert. Zool., July 21, 1916). 
Natural History—Miller (1897b, pp. 84-85) gives the following 
account, furnished by Dr. T. S. Palmer, of the colony of bats from 
which the type specimen of Myotis thysanodes was taken: 
