33. PITUOPHIS 717 



13%; 4 6 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%; and 77, 78, 99, 910, and 1010, 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%; 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 3 1 .3 rows. The gastrosteges vary in number 

 from 209 to 231, males having from 209 to 231, females 

 from 218 to 23 1 ; the average in 1 6 males is 2 1 9, 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. 



