1908] Grinnell—Biota of the San Bernardino Mountains. 155 
down towards the desert, as well as at Cushenbury springs on the 
desert proper. That the species ranges well over the divide onto 
the Pacifie slope of the mountains was shown by my securing two 
examples, adult and young males, July 11, 1906, on the south 
face of Sugarloaf, about 6700 feet altitude. This was in a stretch 
of sage near a cienaga and not more than half a mile from the 
Santa Ana itself. Further than this, on June 18, 1905, I saw a 
single jack rabbit at the lower edge of the tamarack pine belt at 
9000 feet altitude on a ridge a short distance north of San Gor- 
gonio peak. These were the only cases coming within my own 
notice of the species wandering so far over to the southwards, 
though I was told of other instances of a similar nature. All 
these specimens showed the extreme pale coloration, like examples 
from the Mojave desert. I cannot see any notable differences in 
either color or size between these and examples from Antelope 
valley, Victorville and Palm springs. The adult male obtained 
on the south face of Sugarloaf measured 2814 inches from the 
tip of the hind legs to the point of the nose when hung up. 
The five specimens taken show the following measurements: 
Tail Hind Length 
No. Sex and age Place and Altitude Total length vertebra foot of ear 
1440 6 ad. Cactus Flat, 6000 ft. 530 90 130 145 
1388 6 ad. Doble, 7000 ft. 543 97 120 147 
1377 9 jv. Doble, 7000 ft. 492 98 124 126 
1714 6 ad. Sugarloaf, 6700 ft. 545 100 125 141 
1715 6 jv- Sugarloaf, 6700 ft. 460 83 112 101 
Lepus auduboni arizonae (Allen). Arizona Cottontail. 
Cottontails were abundant in August around Cushenbury 
springs and Box S springs at the desert base of the mountains, and 
a few were seen and one secured, at Cactus Flat, 6000 feet alti- 
tude. We failed to obtain specimens on the Pacifie slope, although 
I saw one near Seven Oaks, and other people reported seeing them 
not infrequently in the same vicinity. It is probable that these 
Pacific slope examples should be referred to the much darker and 
smaller-eared L. audubont auduboni. We preserved five speci- 
mens from Cushenbury springs and Cactus Flat, two of which 
are half-grown young. The other three seem to be fully adult 
and measure as follows: 
