SNAKES OF THE GENUS PITUOPHIS 



173 



of El Centro, Meloland (all Klauber, 1931, pp. 77-81); Riverside County, 4 

 miles northwest of Indian Wells in Coachella Valley (Mosauer, 1935, p. 20), 

 4 miles south of Coachella (Klauber, 1931, p. 77); San Bernardino Counly, 

 Bryman, Wild, Yermo, Halloran Spring, Mountain Pass (Klauber, 1932b, 

 p, 125); San Diego County, Carrizo (Klauber, 1931, p. 49). 

 Nevada: Clark County, Glendale, State Line Wells (Klauber, 1932b, p. 125); 

 Lander County, Austin (Van Denburgh and Slevin, 1919, p. 217; Van Den- 

 burgh, 1920, p. 20; Van Denburgh and Slevin, 1921a, p. 37; Van Denburgh 

 1922, vol. 2, p. 728); 10 miles northeast of Battle Mountain (Burt 



41 



32 



52 



15 



28 



_^_____ ___^^ _____ _— . 



-^ , 



15 



14.5 

 14 

 13.5 



13 



12.5 



12 



11,5 



11 



10.5 



10 



9.5 



9 



Region No. 1 2 3 4 5 6 



Figure 76. — Geographic variation in number of infralabials in Pituophis catenifer desertkola. 



and Burt, 1929b, p. 457; Nye County, east side of Pahrump Valley 

 (Merriam, in Stejneger, 1893, p. 207); Washoe County, Nixon (Van Den- 

 burgh and Slevin, 1919, p. 217; Van Denburgh, 1920, p. 20; Van Denburgh, 

 1922, vol. 2, p. 728); Sutchflfe (Van Denburgh and Slevin, 1921a, p. 37), 3 

 miles east of Reno (Burt and Burt, 1929b, p. 456); Snake Creek (Yarrow, 

 1875, p. 541), an indefinite locality that could not be found. 

 Utah: Beaver County, Beaver (Yarrow, 1875, p. 541); Iron County, Rush Lake 

 (Yarrow, 1875, p. 541; Van Denburgh, 1922, vol. 2, p. 732); Juab County, 

 Silver City (Tanner, 1927, p. 27) ; near Eureka (Tanner, 1928, p. 67) ; Millard 

 County, 7 miles south of Kanosh (Van Denburgh, 1922, vol. 2, p. 732) ; Fill- 

 more Canyon; flats in vicinity of Fillmore (Ruthven, 1932, p. 4); Salt Lake 

 County, Dry Canyon; flats in vicinity of Salt Lake City (Ruthven, 1932, 

 p. 4); Tooele County, Orrs Ranch in Skull Valley (Ruthven, 1932, p. 4); 



