PHYLLASTOMATID^ 277 



I know of no instance of their occurance in California in winter, 

 and I have failed to find them at all in January in a place where 

 I can nearly always find them in spring and summer. They prob- 

 ably spend the day in caves, crevices in rocks and similar dark 

 places. I have not seen them on the wing until all the twilight 

 has faded away. The young are born in June. More than half 

 of the females bear two young, the remainder but one. - 



