Vor. III] GRINNELL—MAMMALS OF CALIFORNIA 279 
Synonyms—V espertilio albescens velifer, part; Vespertilio 
albescens evotis, part. 
Range—Upper Sonoran zone in southern California near 
the desert divide; known only from Fort Tejon, Kern County, 
and Dulzura, San Diego County (Miller, supra cit.). 
Lasionycteris noctivagans (Le Conte) 
Silver-haired Bat 
Original description—“Vespertilio noctivagans Le Conte, 
McMurtrie’s Cuvier’s Animal Kingdom, 1, June, 1831, p. 
431.” ; 
Type locality—“Eastern United States.” 
Range—Chiefly Transition zone in northwestern California, 
south to Nicasio, Marin County, and Nevada City, Nevada 
County (Vidller, Ns Amen Fauna’ 135 1897; p) 86); east to 
Mount Shasta and to Oroville, Butte County (Mus. Vert. 
Zool.). Records for summer only. 
Pipistrellus hesperus hesperus (H. Allen) 
Canyon Bat 
Original description—Scotophilus hesperus H. Allen, Smith- 
sonian Misc. Coll., 7, June, 1864, pp. 43, 44. 
Type locality—Fort Yuma, Imperial County, California. 
Synonyms—V esperugo hesperus, part; Western Bat, part. 
Range—Lower Sonoran zone east of the San Diegan dis- 
trict, on the Colorado and Mohave deserts, from the Mexican 
line north to the vicinity of Walker Pass and Owens Valley; 
west to Santa Rosa Mountains, Riverside County, and Fort 
Tejon, Kern County (Mus. Vert. Zool.). 
Pipistrellus hesperus merriami (Dobson) 
Merriam Bat 
Original description—V esperugo merriami Dobson, Ann. 
and Mag. Nat. Hist., 5th ser., 18, 1886, p. 124. 
Type locality—Red Bluff, Tehama County, California (fide 
Miller, N. Amer. Fauna, 13, 1897, p. 31). 
Synonyms—V esperugo hesperus, part; Pipistrellus hesperus, 
part; Western Bat, part. 
