398 CALIFORNIA ACADEMY OF SCIENCES  [Proc. 47H Srp. 
14.—Dipsosaurus dorsalis (Baird and Girard) 
Our present collection contains seventy specimens of this 
lizard. Sixty-seven of these were collected at Yuma, March 
11-21, 1912, and June 8-25, 1910. One (No. 34209) was 
shot at Papago Wells, Yuma Co., April 16-22, 1912. Two 
(Nos. 17284 and 17285) were secured at Cave Creek, Mari- 
copa County, April 20, 1910. 
Of these specimens, sixty-two have the rostral separated 
from the nasal on each side by two granules, one has two on 
one side and none on the other, while six have but one granule 
intervening on each side. The femoral pores vary from 18 to 
26; being 18 five times, 19 thirteen times, 20 twelve times, 
21 twenty-one times, 22 twenty-two times, 23 twenty-nine 
times, 24 seventeen times, 25 nine times, and 26 three times. 
15.—Sauromalus ater Duméril 
The single Arizonan specimen (No. 17645) in our collection 
was secured near Cave Creek, Maricopa Co., July 19, 1910. 
Its femoral pores are 16-17. I have seen a specimen secured 
near Tempe, Maricopa Co., and we caught a young one (No. 
33446) March 18, 1912, on the California side of the Colorado 
river a few miles below Yuma. 
16.—Crotaphytus collaris baileyi (Stejneger) 
One (No. 34321) was collected May 7, 1912, in the foot- 
hills of the Catalina Mountains, near the steam pump eighteen 
miles north of Tucson. Eight (Nos. 35128 to 35135) were 
secured August 6-8, 1912, at Cave Creek, Chiricahua Moun- 
tains, Cochise County. These lizards are very timid. They 
seem to come out late in the afternoon, and then appear on 
the tops of boulders, where they may be seen bobbing up and 
down as many lizards do. This seems to be distinctively a 
rock-loving species, while C. zwislizgent is found on the ground. 
The femoral pores in these specimens vary from 14 to 19; 
being 14 once, 15 twice, 16 five times, 17 five times, 18 four 
times, and 19 once. 
17.Crotaphytus wislizenii Baird and Girard 
Nine of these lizards were collected by us. Two were shot 
near Yuma, No. 33490, March 19, 1912, and 33686 Sept. 9, 
