264 University of California Publications in Zoology [Vow.17 
nearer to bases of toes than to ankle. Claws on both feet and thumbs 
long, well curved, and of needle-like slenderness. 
Pelage-—F ur everywhere full and soft. Longer hairs on middle 
of back about 7 millimeters in length. Ear haired dorsally only at 
base, but ventrally short fine hairs scattered sparsely over entire 
surface. Wing membranes naked save where body fur extends alone 
line of attachment of wings to body. Uropatagium very scantily 
haired on its ventral surface. Toes scantily haired, both above and 
beneath, on terminal joints. 
Color—Distal portion of fur on back isabella color; bases of the 
hairs chaetura black. Ventrally, the bases of the hairs are chaetura 
black and the tips are a pale tint of light buff. Wings, feet, and 
membranes deep clove brown, which becomes lighter at posterior edges 
of wing membranes and uropatagium. 
Skull—Of medium size for the genus (length 14.2 to 15.0 milli- 
meters). Brain-ecase and rostrum broad and heavily built. Rostrum 
not sharply turned up at tip, and forehead sloping back very gently. 
Sagittal crest but faintly indicated, and occipital elevation very slight. 
The brain-ease lacks the inflation at the front which is a character of 
some other members of the genus. (See pl. 21, fig. 31; pl. 22, fig. 43.) 
Measurements.—Average and extreme measurements of a series of 
eight adult examples of Myotis lucifugus altipetens from California 
are as follows: Total length, 86.8 (79.0—-91.0) ; tail vertebrae, 35.6 
(31.0-41.0) ; tibia, 15.6 (15.3-16.4) ; foot, 10.4 (9.0-12.0) ; forearm, 
35.8 (35.2-36.5) ; greatest length of cranium, 14.5 (14.2-15.0). 
Synonymy and History.—This species was described under the 
name Myotis yumanensis altipetens, by H. W. Grinnell (1916, pp. 
9-10). The type specimen was taken one mile east of Merced Lake, 
Yosemite National Park, at an altitude of 7500 feet. Four of the 
five specimens of bats secured by C. H. Merriam (1899, p. 89) in the 
Hudsonian Zone on Mount Shasta and by him recorded as Myotis 
yumanensis saturatus have been examined by the writer and prove 
to be MW. 1. altipetens, as does the specimen recorded by Rehn (in Stone, 
19046, p. 590) under the name Myotis yumanensis, from Mount 
Tallae. F 
Distribution.—As indicated by the material at hand, the High 
Sierra bat inhabits the central Sierra Nevada, the vicinity of Mount 
Shasta, and the Warner Mountains. It oceurs chiefly in the Can- 
adian and Hudsonian zones, and has been secured at a greater altitude 
than any other bat in the collection of the Museum of Vertebrate 
Zoology. Merriam (1899, p. 89) says of his Mount Shasta specimens: 
‘“‘The species is interesting as the only bat secured in the Hudsonian 
zone.’’ The following list of localities shows the record stations thus 
far established in California. (See map, text-fig. H.) 
