148 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



with keeled, and below with smooth, scales. The posterior surface of the 

 thigh is covered with imbricate scales, a few of which are keeled. The 

 lateral caudals are strongly keeled and mucronate, while the inferior 

 caudals are smooth proximally, but become keeled on the distal portion 

 of the tail. 



The general coloration in alcohol is grayish brown, with very small 

 scattered black spots on the body, neck, and fore limbs. Some larger 

 black spots on chest and throat, the center of which is dark blackish 

 brown. No vertical dark blotches or distinct rounded spots or light 

 medium band on back. There is a black antehumeral blotch. The top 

 and sides of the head are dark olive brown, unicolor. The hind limbs and 

 tail are lighter olive brown, unspotted. The chest and center of belly 

 are grayish white. The throat and sides of belly, head, and body are 

 suffused with red. 



Length to anus mm. 95 



Length of tail 132 



Snout to ear 19 



Width of head 15 



Fore limb 37 



Hind limb 64 



Base of fifth to end of fourth toe 25 



Height of crest on nape 1.1 



Height of crest on midbody 1 



Height of crest on tail 2 



Coloration in life of adult male. — Above olive brown, black- 

 spotted except the head; tail more brownish with few dark 

 spots; hind limbs and tail light blue, gray-spotted; fore limbs 

 dark-spotted like the back. Sides of head and body, from 

 snout to tip of tail, brick red, finely black-spotted on sides and 

 along the belly, where the red is brightest; a black ante- 

 humeral spot. Throat black; breast, mandible, and fore limbs 

 reddish, black-spotted; chin, belly, hind limbs, and tail in- 

 feriorly red. 



Coloration in life of adult female. — Above olive brown. 

 Sides of head and body from snout to tip of tail brick red, 

 darkest dorsally where the red extends high up and encroaches 

 on the dorsum, brightest along the belly; a black antehumeral 

 spot. Below red from mandible to tip of tail, darkest an- 

 teriorly on lower jaw, brightest on tail; breast and belly 

 lighter, breast dark-spotted. 



Variation. — Females have more of the red suffusion than 

 the males, and show fewer black spots on the sides and back, 

 and less black on the throat. In some females the red covers 

 not only the lower surfaces of the belly, sides, and tail, but 

 extends up on the back. 



The head-scales are subject to considerable variation. The 

 interoccipital is always very large, though it sometimes is only 

 a little wider than long. There seems to be but little variation 



