1918] Grinnell: A Synopsis of the Bats of California 309 
Surv.) ; Death Valley, 4 (U.S. Biol. Surv.) ; Saline Valley, 1 (U.S. 
Biol. Surv.); Panamint Valley, 6 (U. S. Biol. Surv.) ; Panamint 
Mountains, 5 (U. S. Biol. Surv.) ; Funeral Mountains, 1 (U. 8. Biol. 
Surv.) ; Mono County: Coleville, 2 (Mus. Comp. Zool.). 
@ PIPISTRELLUS HESPERUS MERRIAMI 
& PIPISTRELLUS HESPERUS HESPERUS 
DISTRIBUTION MAP 
MUSEUM OF VERTEBRATE ZOOLOGY 
UNIVERSITY OF CALIFORNIA, 
Fig. P. Map showing stations of occurrence in California of Pipistrellus 
hesperus hesperus and Pipistrellus hesperus merriami, as established by specimens 
examined by the author, 
Natural History.—Stephens (1906, p. 270) records these bats as 
appearing early in the evening, sometimes soon after sunset, but 
states that because of their swift and erratic flight they are difficult 
to secure by shooting. 
