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. 0. 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. 0. discutatus, and 
certain specimens from near Lake Tahoe leave one in doubt 
as to whether they might best be referred to as T. 0. vagrans, 
T. 0. couchii, or even T. 0. elegans. 
The two specimens from the San Pedro Martir Moun- 
tains in northern Lower California, which formerly were 
referred to T. hammondii, are very typical vagrans in 
coloration, but have low labial and gastrostege counts. They 
constitute by far the most southern record for this subspecies 
