1918} Grinnell: A Synopsis of the Bats of California 343 
Specimens Examined.—Total number 28, from the following 
localities in California: Imperial County: Palo Verde, 1; San Diego 
County: Julian, 1; Vallecito, 2; San Diego, 1 (San Diego Soc. Nat. 
Hist.) ; Riverside County: near Kenworthy, San Jacinto region, 17; 
Riverside Mountain, near Colorado River, 2; Whitewater, 1; San Ber- 
nardino County: Oro Grande, 2 (U.S. Biol. Surv.) ; Inyo County: 
Lone Pine, 1 (Mus. Comp. Zool.). 
Natural History.—Stephens (1906, p. 265) states that the pale 
lump-nosed bat appears to inhabit caves. All specimens of this bat 
which have been taken in California have been, as far as the writer is 
aware, captured in caves or mine tunnels, with the exception of those 
secured by Stephens at Vallecito, San Diego County. This collector 
writes (MS) that at Vallecito there is an old adobe house, vacant and 
without windows or doors. When camped in the vicinity Stephens 
made a practice of filling the windows with brush and hanging 
blankets above the doorways, ready to be let down. After dark a 
lantern was taken into the building and the blankets let down. As 
the bats flew about they were secured with a butterfly net. They 
did not come into the building until some time after dark, often an 
hour after the last rays of daylight. The only bats secured in the 
above manner were of the genera Corynorhinus and Macrotus. 
The seventeen specimens taken May 22 and June 5, 1908, at Ken- 
worthy, San Jacinto Mountains, were secured in an old mine tunnel 
some 600 feet in leneth and were found scattered along singly, cling- 
ing to the sidewalls from a few feet within the entrance nearly to 
the end. The bats were cold and searcely able to move. The ears 
were folded down the sides and almost completely hidden by the 
wings which were held together in front, that is, against the rock. <A 
female among the bats taken here contained one large embryo (see 
Grinnell and Swarth, 1913, pp. 379-3880). Of these seventeen speci- 
mens fifteen were males. 
J. Grinnell (1914, p. 263) reports the finding on March 18, 1900, 
of three bats of this species clinging to the rock wall at the end of 
the sloping drift in the Steece copper mine at Riverside Mountain, on 
the Colorado Desert. Both of the specimens secured were females 
and one contained a single embryo. 
Because of its fondness for caves and tunnels this bat is well 
known to miners, who, in recognition of its long ears eall it the 
““burro bat.’’ 
On March 15, 1915, a live male Corynorhinus r. pallescens was 
