302 University of California Publications in Zoology [Vou.17 
MEASUREMENTS IN MILLIMETERS OF TWELVE SPECIMENS OF LASIONYCTERIS 
NOCTIVAGANS (LECONTE), FROM CALIFORNIA 
E SE Se 38 
5 a 45° 85) Se 
Mus ef ae = i) PEE Se ce 
no. Sex se S 2 Gq & 5 2 Nim a7 
3281-7 gi 102.0 41.0 17.0 10:05 3920 ees 
3282+ 99.0 38.0 17.0 LOO 42:0 ee Paw 
184937 gf? 92.0 OO) eee 9.5 15.5 9.3 4.0 
3279° 9° 98.0 41.0 15.0 1010305540!) ee at see ac 
3280® 9° 106.0 42.0 18.0 10.0 16.4 aie 8.5 4.3 
24208 9° 104.0 41°00) ye 8.0 16.2 9.5 7.9 4.2 
24212* 9 106.0 42.0 15.8 9.0 16.3 a 8.0 4.2 
DAZ NOM LOI eee 44.0 16.0 920) 16.2 era 79 4.1 
24211* 9 107.0 42.0 14.3 9.0 aiid?) ESS 9.8 8.0 4.1 
24207* © 105.0 42.0 14.7 8.0 39.7 16.5 9.9 8.0 4.2 
24209 9 98.0 4010) Bas 8.0 38.4 16.2 9.7 8.0 4.3 
24213* 9 105.0 44.0 15.0 9.0 38.3 16.1 = 7.9 4.4 
1 From 7000 ft., Mt. Shasta, Siskiyou County. 
?From 4 miles north of Oroville, Butte County. 
*From McCloud River, near Baird Station, Shasta County. 
4From Fyffe, 3700 ft. alt., Eldorado County. 
Specimens Examined—The writer has examined 40 specimens of 
the silvery-haired bat, from the following localities in California: 
Siskiyou County: Kangaroo Creek, 2; Mt. Shasta (at 7000 feet alti- 
tude), 2; Shasta County: McCloud River, 15 miles east of Baird 
Station, 2; 13 miles east of Baird Station, 2 (Univ. Calif. Dept. 
Zool.) ; near Baird Station, 1; Humboldt County: Redwood Creek, 1 
(U. S. Nation. Mus.) ; Trinity County: Cafion Creek, 2 (U.S. Biol. 
Sury.); Butte County: 4 miles north of Oroville, 1; Mendocino 
County: Mt. Sanhedrin, 5 (Acad. Nat. Sci. Phila.) ; Nevada County: 
Nevada City, 1 (U. S. Biol. Surv.) ; Eldorado County: Fyffe, 11; 
Bijou, 1 (Acad. Nat. Sci. Phila.) ; Marin County: Olema, 1 (Calif. 
Acad. Sei.) ; Nicasio, 6 (Amer. Mus. Nat. Hist., 3; U. S. Nation. Mus., 
3); Monterey County: Pacifie Grove, 1 (U. S. Biol. Surv.). 
Natural History—The most extended account of the habits of the 
silvery-haired bat is that of Merriam (1884, p. 190). His observa- 
tions were made in the Adirondack region of New York. Here he 
found the bats showing when abroad in the evening a decided liking 
for waterways, in some places keeping directly over the water. Sey- 
eral bats which were shot and fell into the water swam swiftly and 
powerfully through the strong current to the shore, fifteen or twenty 
feet distant. A scarcely less favored haunt was the edges of hard- 
wood groves, where the bats darted in and out among the branches 
in search of insects. 
