ei) tee 
1918] Grinnell: A Synopsis of the Bats of California 255 
MEASUREMENTS IN MILLIMETERS OF EIGHTEEN FEMALES OF MAaAcrotTus 
CALIFORNICUS BAIRD, FROM NEAR TORRES (= Toro), 
RIVERSIDE COUNTY, CALIFORNIA 
é E as 
ae 2 2 5 Bs 
1206 103.0 21.5 16.0 48.3 23.6 3 
1207 97.0 22.0 16.0 50.0 23.6 11.3 
1208 95.0 23.2 16.0 50.0 22.7 11.0 
1209 100.0 23.6 17.0 52.6 23.0 11.0 
1210 95.0 22.2 16.0 AOOy seis, eee) 0 SE ae 
1211 99.0 22.2 16.0 49.1 22.6 11.8 9.8 3.6 
1212 96.0 23.0 15.0 50.5 22.8 11.3 10.0 3.4 
1213 100.0 24.2 17.0 50.0 23.2 11.0 9:9) 3.6 
2M) AEE Anse a eee 15.0 50.2 23.2 10.8 10.0 3.5 
1215 95.0 37.0 22.0 15.0 49.5 22.5 11.4 929, 3.7 
1216 94.0 36.0 20.8 15.0 46.8 23.4 11.3 10.0 3.7 
1217: 96.0 33.0 22.3 14.0 49.3 23.0)) ge 10.0 3.4 
1218 99.0 38.0 21.7 16.0 50.3 23.3 11.2 9.8 3.4 
1219 95.0 39.0 22.6 15.0 48.0 23.0 11.0 9.2 3.3 
1220 95.0 39.0 23.6 16.0 52.0 23.0 11.2 10.0 3.7 
1221 93.0 37.0 23.4 16.0 50.0 22.8 11.0 9.8 3.5 
1222 101.0 41.0 23.7 16.0 51.0 23.6 11.4 10.0 3.5 
1223 101.0 36.0 23.4 14.0 51.7 23.7 11.6 itl 3.7 
Distribution.—The distribution of Macrotus californicus was given 
by Rehn (1904, p. 441) as throughout the arid region of the south- 
western United States, Lower California and Sonora. The species is 
now recorded from as far eastward as Tombstone, Arizona (Rehn, 
loc. cit.) ; westward to De Luz, San Diego County, California (see 
below) ; south to Camoa, Rio Mayo, Sonora, and Cape San Lucas, 
Lower California (Rehn, loc. cit.) ; north to Riverside, California 
(Stephens, MS). In California the leaf-nosed bat seems to be con- 
fined to the hottest parts of the Lower Sonoran zone, mainly on the 
Colorado Desert. (See map, text-fig. H.) 
Specimens Examined.—The writer has examined 113 specimens 
from the following localities in California: San Diego County: Valle- 
cito, 16 (U. S. Nation. Mus., 9; Mus. Vert. Zool., 7); De Luz, 10 
(Stanford Univ., 8; U. S. Nation. Mus., 2); Santa Margarita Ranch 
and River, 17 (Stanford Univ.) ; Imperial County: Indian Wells, 4 
(U. S. Nation. Mus.) ; Mecca, 2; Palo Verde, 1; Riverside County: 
Colorado desert near Torres [= Toro], 63. 
Natural History —In September, 1893, Edward Hyatt (MS) cap- 
tured eighteen specimens of Macrotus californicus in a cave on the 
