264 
University of California Publications in Zoology [Yol. 27 
This seems to be the subspecies of boylii which approaches most closely to the 
species pretiosa. A few specimens can be found in which the vomerine teeth are 
confined to the ends of slight swellings on the vomerine ridges, much as in 
pretiosa . . . ; the outline of the head is in some specimens the same as in pretiosa, 
and the short hind leg carries the resemblance still farther. The dorsal color 
pattern, while usually quite different from that in pretiosa, suggests the latter 
in an occasional individual. I am inclined to place sierrae with boylii on account 
of the character of the vomerine teeth in most of the specimens . . ., the usual 
absence of distinct dorso-lateral folds, the mottling of the upper lip, the lack of 
red in the coloration of the under parts, and the suggestion of a white, anterior 
head-patch in seven or eight out of the 150 specimens examined. 
Measurements of Adult Specimens of Bana boylii sierrae from Yosemite 
National Park, California 
M.V.Z. 
No. 
Sex 
Head-and-body 
length 
Length of head 
Width of head 
uqjo 
Interorbital 
space 
Forearm 
Hand 
Femur 
Tibia 
Tarsus 
Whole foot 
5970 1 
9 
56.7 
17.3 
19.0 
6.1 
4.1 
11.8 
14.6 
31.0 
29.0 
14.0 
41 
6013 1 
9 
57.0 
17.6 
18.8 
6.7 
4.3 
12.0 
13.3 
27.0 
28.0 
14.0 
41 
5979 1 
9 
58.0 
17.0 
19.5 
6.0 
4.4 
11.4 
13.5 
25.0 
27.5 
13.0 
40 
5987 2 
9 
65.5 
22.0 
25.0 
8.3 
6.1 
16.4 
17.5 
34.0 
39.2 
18.7 
55 
5996 1 
9 
67.4 
21.0 
22.5 
6.7 
5.1 
14.0 
16.8 
31.0 
34.0 
16.0 
48 
5998 1 
d 
50.0 
15.0 
15.6 
5.4 
4.0 
11.7 
11.0 
22.8 
24.0 
12.0 
36 
5999 1 
d 
52.0 
16.0 
18.0 
6.4 
3.5 
12.0 
10.8 
25.0 
26.4 
12.5 
39 
5963 1 
d 
54.0 
16.4 
18.0 
5.6 
3.3 
12.0 
12.0 
24.4 
25.5 
12.0 
38 
6019 3 
d 
54.0 
17.5 
17.3 
7.3 
4.0 
12.0 
12.5 
21.3 
25.0 
39 
5991 1 
d 
59.0 
18.0 
18.6 
6.4 
4.4 
12.8 
13.0 
26.0 
28.0 
13.7 
41 
1 Vogelsang Lake, 10,350 ft., Aug. 30, 1915. 
2 Sunrise Trail at 7300 ft., Aug. 19, 1915. 
3 Evelyn Lake, 10,350 ft., Sept. 6, 1915. 
Range . — This frog is restricted to the alpine portions of the central 
and southern Sierra Nevada in California. It has been recorded from 
Taylor Meadow, 7000 feet, Tulare County, north to vicinity of Young 
Lake, Tuolumne County, in Yosemite National Park. The lowest 
station of record is that given above ; this form occurs on Whitney 
Creek, Tulare County, at 11,500 feet, and in the head of Lyell Canon, 
Yosemite National Park, at 10,500 feet. These two stations are both 
at, or very close to, timber line. In addition to the intermediate locali- 
ties given by Camp (19175, p. 121) this subspecies has been found at 
Huntington Lake, 7000 feet, Fresno County, and at Mammoth Lakes, 
9200 feet, and Pine City, 8700 feet, Mono County (Mus. Vert. Zool.). 
The status of the frogs of this group at Lake Tahoe is unknown. 
