33. PITUOPHIS AU 
13%; 46 in one, or 4%; and 2—3 in one, or 4%. The 
supralabials are 8—8 in twelve, or 48%; 8—9 in eight, or 
32% 3 and 7—7, 7—8, 9—9, 9—10, and 10—10, each in 
one, or 4%. The infralabials are 13—13 in twelve, or 50%; 
12—12 in six, or 25%; 14—14 in two, or 8%; 12—13 
in two, or 8% 3 and 12—14, and 11—14 each in one, or 
4%. The scale rows are 31 in thirteen, or 46%; 33 in 
eight, or 29%; 29 in six, or 21%; and 35 in one, or 4%; 
the average is 31.3 rows. The gastrosteges vary in number 
from 209 to 231, males having from 209 to 231, females 
from 218 to 231; the average in 16 males is 219, in twelve 
females, 224. The urosteges vary from 55 to 74, males 
having from 61 to 74, females from 55 to 66; the average 
in fifteen males is 68; in eleven females is 60. 
The dark blotches between head and anus in 28 speci- 
mens vary from 48 to 70, the average being 57.6. On the 
tail, in 32 specimens, they vary from 13 to 19, and aver- 
age 15. 
Distribution.—This subspecies occupies the Klamath re- 
gion in Oregon, and, in California, the Sacramento Valley, 
the northern part of the San Joaquin Valley, and the west- 
ern slope of the Sierra Nevada, except in the southern end 
of the range. Along the western edge of its territory it 
intergrades with P. catenifer catenifer, and in the south with 
P. catenifer deserticola. 
Washington specimens recorded by Dr. Blanchard as P. 
c. deserticola seem to me to belong to this subspecies. They 
were collected in Okanogan (Omak Lake) and Spokane 
(Marshall) counties. It is probable that those secured by 
Dice in Walla Walla (Wallula) and Columbia counties also 
belong here. The same may be true of specimens from 
Colville, Stevens County, Fort Walla Walla, Walla Walla 
County, and Almota, Whitman County. 
