REPTILES OF THE PACIFIC COAST. 53 



Yarrow has recorded a Holbrookia as having been col- 

 lected at Fort Tejon, California, but there is not the 

 slightest probability that this is correct. 



Genus 9. CROTAPHYTUS. 



Crotaphytus, HOLBKOOK, N. A. Herpetology, II, 1842, p. 79 (type 

 collaris) . 



The head and body are somewhat depressed, and much 

 shorter than the tapering tail. All of the head-plates 

 are small. The labials are not imbricate. The ear- 

 opening is large, without strong denticulation. The 

 dorsal scales are small and nearly uniform. Long series 

 of femoral pores and one or more tran verse gular folds 

 are present. There are no spinose tubercles on the 

 neck. The superciliaries are imbricate. Males have 

 enlarged postanal plates. 



SYNOPSIS OF SPECIES. 



a. Two black bars across the shoulders C. baileyi. p. 53. 



a 2 . No black bars across shoulders. 



b. Greatest width of head less than distance between nostril and ear- 

 opening C. wislizenii. p. 56. 



b'-. Greatest width of head equal to or greater than distance between 

 nostril and ear-opening C. silus. p. 59. 



10. Crotaphytus baileyi Stejneger. BAILEY'S LIZARD. 



Crotaphytus baileyi, STEJX., N. A. Fauna, No. 3, 1890, p. 103, pi. 

 XII, fig. 1 (type locality Painted Desert, Little Colorado 

 River, Arizona); and 1. c., No. 7, 1893, p. 165. 



Description. Head large, depressed, and very distinct 

 from the neck on account of swollen temples. Its 

 plates all small, but largest and somewhat convex on 

 snout. Two longitudinal rows of shields separating 

 supraocular regions. Nostrils large and opening later- 

 ally, each in a round plate nearer to end of snout than^ 

 to orbit. Superciliaries small but imbricate. Supra- 

 labials rather prominent and of nearly equal size. A 



