PLATE 19 
Fig. 19. Mastiff bat (Humops californicus, no. 19022 [or 1], 2); X 0.41. 
Dorsal view of individual taken at Sierra Madre, Los Angeles County. Photo- 
graphed under chloroform. Note the large ears, joined at their anterior bases; 
the long narrow wings, the fifth metacarpal being scarcely more than half the 
length of the third; the greatly exserted tail; the different quality of the pelage 
on the dorsal surface of the head from that on the back; the stout foot; and the 
short tibia. 
Fig. 20. Mastiff bat (Huwmops californicus, no. 19283 [or 2], 2); X 0.58. 
Ventral view of individual taken at Sierra Madre, Los Angeles County. Photo- 
graphed under chloroform. Note the downward-directed nostrils, huge mouth, 
wrinkled ears, long, slender wings, and stout thumbs. 
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