40. THAMNOPHIS 833 



(Provo), Piute (Marysvale), Beaver (Camp Beaver, Indian 

 Creek Canyon in the Tushar Mountains) and Iron (Rush 

 Lake), counties, and at North Creek, Kobeh Valley, and 

 Juab. 



In Nevada, in Humboldt (Pine Forest Mountains, 

 Quinn River Crossing, Virgin Valley), Washoe (Winne- 

 mucca Lake, Little High Rock Creek), Nye (Smoky Val- 

 ley), Churchill (Fallon), Lander (Battle Mountain), 

 Eureka (Palisade), and Elko (Elko, Deeth), counties, and 

 at Snake Valley and Pyrmont. 



In California, in Mono (Mono Lake, Walker Lake). 



In Arizona, in Coconino (Grand Canyon, San Francisco 

 Mountain, Oak Creek, Winslow), and Yavapai (Prescott, 

 Fort Whipple, Fort Verde), counties. 



In Lower California, two specimens have been taken in 

 the San Pedro Martir Mountains. 



This subspecies remains remarkably true to its peculiar 

 color characters throughout the vast area which constitutes 

 the greater portion of its range. It is only along the west- 

 ern edge of this area that much variation occurs. Specimens 

 from western Nevada and from eastern California vary 

 towards T. o. biscutatus, T. o. couchii and T. o. elegans, so 

 that it may be said that intergradation with all the forms 

 occurs. Thus, specimens from Humboldt County, Nevada, 

 frequently have two preoculars as in T. o. biscutatus, and 

 certain specimens from near Lake Tahoe leave one in doubt 

 as to whether they might best be referred to as T. o. vagrans, 

 T. o. couchii, or even T. o. elegans. 



The two specimens from the San Pedro Martir Moun- 

 tains in northern Lower California, which formerly were 

 referred to T. hammondi^ are very typical vagrans in 

 coloration, but have low labial and gastrostege counts. They 

 constitute by far the most southern record for this subspecies 



