138 CALIFORNIA ACADEMY OF SCIENCES. 



provided with rings of large, obliquely keeled scales. 

 Femoral pores var^dng in number from eighteen to 

 twenty-three. 



The back is grayish or yellowish brown with about 

 seven or nine wavy black longitudinal bands or rows of 

 spots which are sometimes broken up into irregular 

 marblings. On the sides of the head and neck are 

 numerous, large, well defined black blotches. The limbs 

 are marbled with black. The tail is yellowish or olive- 

 brown, darkest along the keels of the upper scales. The 

 lower surfaces are creamy or buffy white, often spotted 

 or blotched with black; the markings on the gular region 

 being few and usually very small. 



Length to amis 79 79 87 99 103 105 



Length of tail 207 204 242 252 231 



Snout to ear IS IS 19 23 22 24 



Snout to interparietal plate 15 15 15 18 18 19 



Width of head 11 11 12 16 13 15 



Fore limb 29 29 .30 33 35 36 



Hind limb 59 .58 64 68 71 73 



Base of fifth to end of fourth toe 30 28 30 31 32 32 



Distribution. — The California Whiptail Lizard re- 

 places C. tigris in the northern, as C. stejnegeri does in 

 the southern, portion of California west of the desert. 

 Its range seems to be continuous with that of C. tigris 

 through Walker and Tehachapi Passes and the Cafiada 

 de las Uvas, and thence extends north on the lower 

 levels of the western slope of the Sierra Nevada at least 

 as far as Mariposa County. West of the San Joaquin 

 and Sacramento Valleys, it has been found at LosGatos, 

 in Santa Clara County, and at Kelseyville, in Lake 

 County. 



Habits. — Very little is known of the habits of this 

 lizard. When hard pressed, it often tries to elude pur- 

 suit by burrowing, although it can run very swiftly. It 

 mates, near Los Gatos, early in June. 



