1918] Grinnell: A Synopsis of the Bats of California 263 
Potholes, 1; San Bernardino County: west side of Colorado River 
above Needles, 2 (U.S. Biol. Surv.). 
Natural History—J. Grinnell (loc. cit.) suggests that the Hollister 
bat is a late spring arrival in the region where it was found, since Hol- 
lister’s two specimens were taken in May, and the Museum expedition, 
although collecting along the Colorado River from February 15 until 
May 15, failed to detect this bat until the first week of May. This 
author states that of the six specimens obtained ‘‘the first was shot at 
late dusk close to the river bank between files of cottonwoods, in 
just the same association as those taken by Hollister. At our second 
locality of capture, the remaining five specimens were shot over the 
water in a back eddy of the river. Here these bats arrived in con- 
siderable numbers at early dusk to drink, flitting down to the water’s 
surface and dipping several times before flying off among the willows 
and cottonwoods. ”’ 
Myotis lucifugus altipetens H. W. Grinnell 
High Sierra Bat 
Myotis ywmanensis satwratus, C. H. Merriam (1899, p. 89). Occurrence on 
Mt. Shasta. 
Myotis ywmanensis, Rehn (in Stone, 1904b, p. 590). Record of specimen 
from Mt. Tallac. 
Myotis yumanensis saturatus, Stephens (1906, p. 267), part. Diagnosis; 
distribution. 
Myotis yumanensis saturatus, J. Grinnell (1913b, p. 277), part. Range in 
California. 
Myotis yumanensis altipetens H. W. Grinnell (1916, pp. 9-10). Original 
description. Type from Merced Lake, Yosemite National Park, Cali- 
fornia. 
Diagnosis —Length, 79 to 91 millimeters; tibia short, 15.0 to 16.4; 
distal portion of fur on back isabella color, on belly pale ght buff. 
Description: Head.—Ear short (about 12 millimeters in height), 
and bluntly rounded at tip (pl. 18, fig. 15) ; anterior border straight 
through lower third, then gently convex to the tip; posterior border 
shghtly concave along upper two-thirds, then convex to basal notch. 
In a dried specimen at hand the tragus is 6 millimeters in height and 
slender, varying in width from 1.5 millimeters near the base to 0.5 
millimeters just below the rounded tip. Nostrils as in other Myotis. 
Limbs and Membrancs.—Membranes leathery but not thick. Cal- 
ear slender and indistinct, greater in length than free border of 
uropatagium; keel not prominent, and terminating lobule scarcely 
apparent. Feet large (9 to 12 millimeters in length) and strong, 
and more than half the tibia in length. The wing arises from a point 
