168 University of California Publications in Zoology. |Vou.5 
ber 169; the urosteges (double series) 84. There are on each 
side 8 supralabials, and 10 infralabials. There are 21 rows of 
scales around the body besides the series of gastrosteges. Ven- 
trally the snake is dusky yellow anteriorly, becoming dusky pos- 
teriorly, finely mottled with slate; there is a pinkish tinge down 
the middle of the belly. Dorsally the snake is uniformly dark 
sepia, without any median dorsal stripe; but on each side in- 
volving the second row of scales dorsally from the gastrosteges, 
a dusky yellowish line runs from the yellowish side of the head 
back to the region of the vent, where it becomes so dusky as to 
merge with the uniformly sordid color clear around. Along each 
side, above the lateral stripes, are flecks of whitish between the 
scales which show when the skin is stretched a little so as to 
separate the scales. There are also flecks of black, mostly further 
down the sides, which likewise show clearest when the scales are 
parted. On the nape of the neck is a dusky yellow dab, which 
looks as though it might be the remnant of a median dorsal stripe ; 
also there is a faint occipital spot. The sides of the head are 
dusky yellowish, with vertical blackish marginings to the suprala- 
bials. As compared with the other form described, this is a large 
dusky brownish snake without median dorsal stripe. 
Crotalus lucifer Baird & Girard. Pacific Rattlesnake. 
This proved to be the commonest snake, with the single ex- 
ception of the little striped garter snake, within the entire region. 
It ranged from the Upper Sonoran zone throughout the Transi- 
tion, on both the Pacific and desert slopes of the mountains. We 
saw several around Doble and Gold mountain, in August, 1905, 
and three were taken at Bluff lake July 21 and 22 of the same 
year. 
During all three summers we found rattlers actually abundant 
along the upper Santa Ana between Seven Oaks and Big Meadows 
(5000 to 6800 feet altitude) ; also in the lower Fish creek canon 
(6500 to 7000 feet), and on the south face of Sugarloaf up to 
6800 feet. We ran across fully thirty individuals in that neigh- 
borhood in the summer of 1906. Most of these were on the canon 
bottom near the willow or rose thickets, though some were along 
the trail that wound through the sage, in places a hundred yards 
