﻿308 3. IGUANIDJE 



they are generally bluish slate but occasionally nearly as in 

 the males." 



Distribution. — The Western Blue-bellied, Fence or Rock 

 Lizard occurs over a wide area which includes western Lower 

 California north of latitude 30 degrees, southern and east- 

 ern California, including the southern part of the San Joa- 

 quin Valley and both slopes of the southern Sierra Nevada, 

 all of Nevada, southern Idaho, and western Utah. Mr. 

 Camp states (1916) that intergrades between this sub- 

 species and Sceloporus occidentalis occidentalis occur in 

 a zone which extends from San Luis Obispo County 

 to western Merced County, thence across the San Joa- 

 quin Valley to Coulterville, Mariposa County, and 

 thence northward over the Sierra Nevada to eastern Modoc 

 County. The range of S. o. occidentalis extends nortli and 

 west from this zone; that of S. o. biseriatus, south and east. 



In California, it has been collected in San Diego (San 

 Dkgo, Dulzura, Campo, Jacumba at 2825 feet, Poway ; 

 Witch Creek, Julian, Santa Ysabel Valley 3000-4000 feet, 

 vicinity Julian, Cuyamaca Mountains, Chihuahua Moun- 

 tains, Escondido, Oak Grove, Warner Pass), Riverside 

 ''Riverside, Temescal, Gavillan, Hemet Valley at 5,000 feet, 

 San Jacinto, Vallevista at 1 700 feet, Cabazon at 1 700 to 2000 

 feet, Banning at 2200 feet, Hemet Lake at 4400 feet, Ken- 



