64 Journal of Entomology and Zoology : 
Uma notata (Baird). 
Only one specimen of this beautiful lizard is found in the museum, and it was 
taken in the sand hills 15 miles east of Blythe Junction, April 2, 1920. The lizard 
is very shy, running rapidly to the shelter of a burrow in the sand, at the least threat 
of danger. (This seems to be between U. notata and U. scoparia.) 
Calisaurus ventralis ventralis (Hallowell). 
This lizard appears to be one of the most numerous and widely distributed of 
the Colorado and Mojave deserts, having been found in almost every type of country 
with the exception of the rocky hills and mountains, from Victorville to Needles and 
south to the Mexican Border in Imperial Valley. In the Providence Mountains they 
were found at an altitude of over a thousand feet. 
In the Imperial Valley they were found to burrow, or push down into the sand 
at the approach of night. Here they remained until sunrise of the next day. At the 
approach of danger they jump from the sand with such suddenness as to give the 
impression of a small explosion. 
The distribution as given above is not intended as a limit to their range but 
merely a note on their presence in those places. 
Crotaphytus collaris baileyi (Stejneger). 
This lizard is represented by three specimens in the college collection. One taken 
from near the Bonanza King Mine, Providence Mountains, March 31, 1920; another 
from the N. E. spur of the Turtle Mountains, and a second and smaller one from 
the same place, April 1, 1920. 
These lizards were found on the rocky hill-sides and were very active and rather 
shy. Their strong jaws and great speed fit them for the predaceous life which they 
lead. In the largest specimen was found an eight inch Cnemidophorus tigris tigris, 
partially digested. 
Crotaphytus wizlizenti (Baird and Girard). 
Two specimens were taken at the grass fields between Blythe and Mecca, on 
April 2, 1920. 
These specimens were found skulking under the branches of the creosote bushes. 
They are very rapid runners, and are predaceous. Their coloring blends admirably 
into the mottled shade where they lie in wait for their prey. A ten-inch Cnemidophorus 
tigris tigris was taken from an eleven inch specimen. Their biting ability was well 
proved upon the collector who picked up one of the specimens which had been only 
wounded. One bite tore through the skin of the first finger, causing a decided flow 
of blood. 
Sauromalus ater (Dumeril). 
One specimen taken in the lava rocks east of Ludlow, March 30, 1920. Two 
specimens taken among the rocks in the N. E. spur of the Turtle Mountains. 
These lizards, which are not fast runners, are usually found near some crevice 
in the rocks in which they take refuge upon the approach of danger. 
The two specimens taken in the Turtle Mountains, April 1, 1920, were found as 
a pair, and when first seen appeared to be in copula. This gives some suggestion as 
to the time of breeding. 
