8. CALLISAURUS 165 



with bluish white or pale gray, and with indications of dark 

 dorsal blotches which usually are most distinct in females 

 nnd young. The top of the head is yellowish olive, clouded 

 with dark slaty gray posteriorly. The upper surfaces of the 

 limbs and tail are crossed by more or less undulating bands 

 of dark brown or blackish slate. A dark line, bordered 

 above and below with white, runs along the back of the 

 thigh. The throat is white, more or less clouded with 

 gray and often with diagonal dark lines. The lower sur- 

 face of the tail is white with about six to eight cross-bars 

 of intense black. The belly is whitish. Males have a 

 large blue patch, marked with two oblique wedge-shaped 

 black bars on each side. Females may have a central gular 

 patch of salmon red. 



Length to anus 66 69 80 82 82 86 



Length of tail 79 92 99 98 10+ 



Snout to back of inter- 

 parietal ._ 12 13 15 14 15 15 



Snout to ear .'. 13 14 16 15 16 16 



Width of head 11 12 I3J^ 14 14 15 



Fore limb 33 38 44 42 41 45 



Hind limb 60 64 75 74 71 74 



Base of fifth to end of 



fourth toe 24 26 29 29 28 29 



Remarks. — This lizard was named and described by 

 Richardson in 1915. He stated that it resembles C. v. 

 ventralis but has a higher ratio between body and tail length, 

 fewer femoral pores, and averages darker in coloration. In 

 a large series from Pyramid Lake, I find that Richardson's 

 statements regarding coloration and femoral pores are cor- 

 rect. As regards the proportions of body and tail, however, 

 the average in 50 specimens from Pyramid Lake is practi- 

 cally identical with that of 50 specimens from various parts 

 of Arizona. Richardson's findings would be confirmed. 



