350 University of California Publications in Zoology  [Vou.17 
tail vertebrae, 47.0 (41.0-53.0) ; tibia, 20.1 (19.0-21.0); foot, 11.8 
(11.5-13.0) ; forearm, 50.9 (50.6-51.4) ; greatest length of skull, 20.6 
(20.4-21.0). 
MEASUREMENTS IN MILLIMETERS OF NINE SPECIMENS OF ANTROZOUS PALLIDUS 
(LEConTR), FROM CALIFORNIA 
oe 
a ny ° Sa BS 
Fs 2 E gee 98 32 22 
Mus. ge 5 5 =) z ga =e 32 BE 
no. Sex. 57 a” - & i ee hia pat ale 
5837* ot) Rede 0) yeceed 2 Ope SII. ees i 
73407 ie) 122.0 53.0 21.0 13.0 50.8 21.0 12.5 10.0 4.2 
73417 io) 113.0 46.0 20.6 12:0 ese 20.6 12.2 O27; 4.0 
7342? 2 103.0 41.0 20.0 11.5 51.4 20.6 12.2 9.4 3.9 
73437 3 102.0 40.0 19.0 11.0 47.2 19.6 11.5 9.0 4.0 
73447 fof 99.0 40.0 18.4 11.0 46.8 19.4 11.6 9.2 3.9 
73457 OF 7 A1320 45.0 19.0 WEST, See 20.4 12.0 9.7 3.9 
T3462) ge - dE0 47.0 19.4 12.0 48.4 20.2 11.8 9.3 4.1 
10696° 2) 112.0 50.0 20.3 12.0 50.6 20.4 11.4 9.5 3.8 
1 From Swansea. Inyo County. 
*From Vallecito, San Diego County. 
*From Colorado River, Imperial County. 
Synonymy and History.—Antrozous pallidus was first deseribed 
by LeConte (1855, p. 487) under the name Vespertilio pallidus. In 
the original description the type locality is given as California, but 
both Baird (1859, II, p. 5) and H. Allen (1864, p. 69) have stated 
that the type material came from El Paso, Texas. The type is now 
in the United States National Museum and according to Lyon and 
Osgood (1909, pp. 278-279) is in a good state of preservation and 
clearly referable to the desert form. 
H. Allen in 1862 (p. 247) made pallidus the type species of the 
new genus Antrozous. 
Merriam in 1897 (p. 179) deseribed the race of Antrozous from 
the region west of the deserts under the name Antrozous pallidus 
pacificus, showing it to be distinet from the form deseribed by Baird. 
Distribution.—The range of A. pallidus is given by Miller (1912, 
p. 68) as being the Lower Austral zone in the desert region of eastern 
California, Nevada, Arizona, New Mexico, and western Texas. War- 
ren (1910, p. 284) gives two records for Colorado. In California 
this species occupies the Lower Sonoran zone on the Colorado and 
Mohave deserts. (See map, text-fig. V.) 
Specimens Examined.—The writer has examined 9 specimens of 
this bat from the following localities in California: Imperial County : 
