284 University of California Publications in Zoology [Vou.17 
residents of the same species coming from a more northerly faunal area, On 
such a hypothesis, a counter tendency in spring would cause a northward flight 
of the species as a whole, until each group had reached its native habitat. 
The two darkest skins in the Museum series referred to Myotis 
californicus quercinus are autumn specimens, one (no. 6952) having 
4 MYOTIS CALIFORNICUS CALIFORNICUS 7 
@ MYOTIS CALIFORNICUS QUERCINUS 
@ MYOTIS CALIFORNICUS PALLIDUS 
ear: 
ye 
DISTRIBUTION MAP 
MUSEUM OF YERTEBRATE ZOOLOGY 
UNIVERSITY OF CALIFORNIA, 
al ma = = = |} 
Fig. M. Map showing stations of occurrence in California of Myotis cali- 
fornicus californicus, Myotis californicus quercinus, and Myotis californicus pal- 
lidus, as established by specimens examined by the author, 
been taken at Pasadena, September 24, and the other (no. 2803) in 
the Cuyamaca Mountains of San Diego County, August 18. It is 
possible that these examples are fall migrants of M. c. califormcus. 
Much more field work remains to be done before the status and dis- 
tribution of these subspecies can be stated with confidence. 
