12. SCELOPORUS 301 



Distribution. The Pacific Blue-bellied Lizard is a 

 northern subspecies, which, ranging south from British Co- 

 lumbia through western Washington and Oregon, occupies 

 the northern part of California. Close to the coast, its range 

 extends as far south as Ventura County. In the north, its 

 territory stretches eastward as far as Lake County, Oregon, 

 and Modoc County, California. 



It occupies the Sacramento Valley and the northern part 

 of the San Joaquin Valley and of the western slope of the 

 Sierra Nevada. Mr. Camp, who has studied the question 

 with abundant material, states that intergradation with S. o. 

 biseriatus occurs in a zone which extends from San Luis 

 Obispo County to western Merced County, thence across the 

 San Joaquin Valley to Coulterville, Mariposa County, then 

 northward over the Sierra Nevada to eastern Modoc County. 

 The range of S. o. occidentalis extends north and west from 

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



Sceloporus occidentalis occidentalis has been taken in 

 British Columbia. 



In Washington, it has been secured at Cape Flattery, 

 Port Townsend and Fort Steilacoom. 



In Oregon, it has been recorded from the Willamette 

 Valley between Portland and Salem, the Upper Willamette 

 Valley, and is known to occur in Wasco (the Dalles), 



