SNAKES OF THE GENUS PITUOPHIS 



89 



Habits and habitat. — Almost nothing has been recorded of the habits 

 of this species, although it must bo fairly common throughout Lower 

 California. 



13 



15 



14.5 



14 



13.5 



13 



12.5 



12 



11.5 



11 



^■^^^-A^— i^.^— I \ — J.i^^— ^m— I III ll III! 



Region No, 1 2 3 4 5 6 7 



Figure 47.— Geographic variation in number of infralabials in Pituophis verlebralis. 



2 3 4 12 4 6 4 



0.150 

 0.145 

 0.140 

 0.135 

 0.130 

 0.125 

 0.120 

 0.115 

 0.110 



Region No. 1 2 3 4 5 6 7 



Figure 48.— Geographic variation in ratio of tail length to total length in Pituophis veHebralis. 



Van Denburgh and Slevin (1921c, p. 67) say of it: "All the speci- 

 mens of this species taken were foimd in the vicinity of towns or small 

 rancherias. According to the natives this species is fairly abundant. 



I 



^"^^ ^^ I ( 



I I I I I I I I I 



