SNAKES OF THE GENUS PITUOPHIS 



191 



inland, and includes San Martin and South Coronado Islands, Lower 

 California, and Catalina Island, Calif. The form is most abundant 

 in San Diego, Riverside, San Bernardino, and Los Angeles Counties, 

 Calif., and the specimens from the most northern and most southern 



5 80 51 



10 



84 

 82 

 80 

 78 

 76 

 74 

 72 

 70 

 68 

 66 

 64 

 62 

 60 



Region 

 No. 



123456 7 8 



Figure 81.— Geographic variation in number of caudals in PUuophis catenifer annedens. 



parts of the range undoubtedly are occasional stragglers, rather than 

 typical members of the fauna of those regions. 



5 81 57 



11 



15 



14.5 



14 



IS. 5 



15 



12.5 



12 



11.5 



11 



Region 

 No. J- 



2 3 4 5 6 7 8 



Figure 82.— Geographic variation In number of infralabials In PUuophis catenifer annedens. 



Specimens have been examined from the following localities: 



Mexico: Lower California, San Jos6 del Cabo, Sierra Juarez, San Pedro Mountains, 

 San Antonio del Mar, Ensenada, Pacific coast, San Martin Island. South 

 Coronado Island. 



