356 University of California Publications in Zoology  [Vou.17 
being wingless, must have been secured upon the ground, the bats 
probably becoming aware of their whereabouts through hearing them 
as they crawled about on the surface of the ground. 
Of six specimens of this bat taken from this colony August 6, 1904, 
four were females and two males, all adult. 
Heller (in Elliot, 1904a, pp. 319-320) found this species rather 
rare at the type locality, Fort Tejon. He says of it: 
Several were secured while I was stopping in an old house. The bats could 
not be found in the house during the day, but at night they entered through 
the open windows, bringing with them large brown mole crickets, which they 
devoured at their leisure while suspended from the roof. The floor of the 
house below their perches was covered with the remains of the insects. 
A female of this species (no. 14654) secured by Swarth and Carr 
May 27, 1911, at Painted Rock, Carrizo Plains, San Luis Obispo 
County, contained two embryos. Stephens (1906, p. 263) states 
that the young of this bat are born about the first of July. Merriam 
(1897, p. 180) found two females, taken June 28, 1891, at Fort Tejon, 
to contain ‘‘large embryos, nearly ready for birth.”’ 
While earrying on field work at Snelling, Merced County, May 
27, 1915, Mr. Charles L. Camp came upon a troop of youngsters who 
were setting up a wire net under the gable end of a church building 
with the intent of ridding the place of a colony of bats the presence 
of which had caused annoyance to the pastor and his congregation. 
Mr. Camp writes (MS): 
I could plainly hear the bats squeaking (6:30 P.M.) inside the wall, at a 
distance of fifty feet from the building. About 7:30 the first bat came out, 
missed the net and flew away. It was quickly followed by another which circled, 
lit on the side of the building, and was shot. No more bats appeared for ten 
minutes and then they began to drop into the net at the rate of about four a 
minute, coming faster toward the last, when twenty-one were found in the trap. 
After the net was taken down at 8 o’clock, many more bats, all apparently of the 
same species (Antrozous pacificus) flew out of the building, circled about in 
the trees and flew away. The bats caught (22 in all) were females, each contain- 
ing one or two embryos, except one which was a male with testes small or medium. 
Bees and red-shafted flickers were living in the same building with 
the bats. 
With one exception all dates of occurrence known to me are be- 
tween March 27 and October 19. In the collection at Stanford 
University are two females secured by C. J. Pierson, January 1, 1895, 
at Carmel Mission, Monterey County. The Pacific pallid bat is 
probably to a partial extent migratory. 
