MYOTIS, 577 
Fort Yuma Bat. 
Type locality. Old Fort Yuma, San Diego County, California. 
Geogr. Distr. State of San Luis Potosi, Mexico, into southwestern 
United States. 
Genl. Char. Size small; calcar distinct, considerably longer than 
free border of interfemoral membrane, terminating in a well-marked 
lobule; free border of uropatagium naked; ears moderate; wings from 
base of toes, but on account of extent of web between toes appar- 
ently from side of metatarsus; feet very large and strong as com- 
pared with other small American species. (Miller.) 
Color. Above pale wood brown, beneath dirty whitish; fur light 
plumbeous at base; ears and membranes light brown; white edges on 
wings and uropatagium. 
Measurements. Total length, 70.2—-83.7; tail vertebre, 34.9—-36.7; 
tibia, 14.1-15.7; foot, 7.9-8.8; forearm, 33.9-34.4; thumb, 5.2-6.5; 
longest finger, 55.5-57.8; ear from meatus, 14-14.4; width of ear, 
8.2-9.1; tragus, 7—7.6. 
a.—saturatus (Myotis), Miller, N. Am. Faun., No. 13, 1897, p. 68. 
Elliot, Syn. N. Am. Mamm., rgor, p. 403. 
Dark Yuma Bat. 
Type locality. Hamilton, Skagit County, Washington. 
Geogr. Distr. State of Michoacan, Mexico, north to Oregon, 
Washington, and British Columbia. 
Genl. Char. Similar to M. yumanensts, but darker. 
Color. Above dark yellowish brown; belly isabella color; chin, 
throat, and sides darker than belly; fur everywhere deep blackish 
plumbeous at base; ears and membranes blackish. 
Measurements. Total length, 77-82.3; tail vertebre, 30—-36.5; 
tibia, 14-15; foot, 8.3-8.6; forearm, 33-35.3; longest finger, 57-59.3; 
ear from meatus, 14.3; width of ear, 8.9; tragus, 7. Skull: occipito- 
nasal length, 12; total length, 13; Hensel, 10; zygomatic width, 7.5; 
interorbital constriction, 4.5; palatal length, 6.5; length of upper 
molar series, 3; length of mandible, angle to symphysis, 9; length of 
lower molar series, 4.5. 
549. orinomus (Myotis), Elliot, Pub. Field Columb. Mus., 111, 1903, 
D.. 2258. 
La GruLLA Brown Bat. 
Type locality. La Grulla, San Pedro Martir Mountains; 8,000 feet 
elevation. 
Genl. Char. Similar to M. californicus, but larger; color paler; 
ear larger. Skull larger; braincase flatter, less elevated above ros- 
