56 CALIFORNIA ACADEMY OF SCIENCES. 



Distribution. — This also is a lizard of the desert, but 

 seems not to live upon its lower levels, preferring the 

 more mountainous portions between the altitudes of 

 about 4,500 and 6,500 feet. In suitable localities it is 

 quite abundant in Inyo, Kern, and San Bernardino 

 Counties, and doubtless occurs also in the eastern parts 

 of Riverside and San Diego Counties, California. It 

 has been recorded from Idaho (mouth of Bruneau River) 

 and is common in western Utah and in most parts of 

 Nevada (Oasis Valley, Juniper Mts., Desert Mts., North 

 Kingston Mts., Reno to Pyramid Lake, Dome Canon, 

 etc.). 



II. — Crotaphytus wislizenii Baird & Girard. Leopard 

 Lizard. 



Crotaphytus Wislizenii, B. & G., Proc. Acad. Nat. Sci. Phila., VI, 

 1852, p. 69 (type locality Santa Fe', New Mexico); and Staiis- 

 bury's Exped. Gt. Salt Lake, 1853, p. 340, pi. Ill; Baird, Mex. 

 Bound. Surv., 1859, pi. XXXI. 



Crotaphytus GambeUi, Baird & Girard, Proc. Ac. Nat. Sci. Phila., 

 VI, 1852, p. 126 (type locality California). 



Description. — Head large, depressed, not so distinct 

 from neck as in G. haileyi. Its plates all small but 

 largest and somewhat convex on snout. Three to five 

 longitudinal rows of shields separating supraocular 

 regions. Nostril large and opening laterally in a round 

 plate much nearer to end of snout than to orbit. Super- 

 ciliaries small but imbricate. Rostral plate wide but 

 very low. Supralabials of nearly equal size. A long 

 subocular plate. Ear-opening large, oblique, with very 

 slight anterior denticulation. Supraoculars and tem- 

 porals granular, as also gulars. Lower labials slightly 

 larger than upper, and bordered below by several series 

 of small plates, larger than gulars. Symphyseal plate 

 very large, but shields behind it not so large as in 

 C. haileyi. From one to three transverse gular folds 



