This bat was on the coastal slope from the sage scrub association at
1100 feet, up to 8000 feet on Blue Ridge, and on the desert slope down
to the upper edge of the Joshua tree belt at 4800 feet in Mescal Canyon.
It was the most common bat at the ponds in San Antonio Canyon in May and
June of 1951, but in September and October of the same year none was
obtained there.
On the Pacific slope of the San Gabriels the big brown bats segregate
according to sex in the spring, the males occupying the foothills and
mountains and the females the level valley floor at the coastal base
of the range. Of 70 big brown bats captured in May and June of 1951, at
the ponds in San Antonio Canyon, only one was a female. A large colony
of more than 200 individuals in a barn near Covina, in the citrus belt,
was composed of only females.
Times of capture of this bat at the ponds in San Antonio Canyon ranged
from ten minutes after sunset to two hours and thirty minutes after
sunset. Generally these bats came to the ponds in groups of several
individuals, and often more than a dozen were captured in the course of
an evening's collecting.
_Specimens examined._--Total, 7, distributed as follows: Los
Angeles County: Mescal Canyon, 4800 ft., 1; San Antonio Canyon,
2800 ft., 2; Covina, 1100 ft., 4 (2PC).
=Lasiurus borealis teleotis= (H. Allen)