Diadophis punctatus punctatus (Linn.) Southeastern Ring' 

 necked Snake 

 Spots on belly rather small, less regular, and often in more than one row 

 along the mid'ventral line; 111. southward 



Diadophis punctatus stictogenys Cope Mississippi Valley Ring' 

 necked Snake 



201. Males usually with more than 205 ventrals, females with more than 218 



ventrals 202. 



Males usually with less than 205 ventrals, females with less than 218 



ventrals 203 



202. Light ring on neck obscure or absent; Idaho to Ariz, and Texas 



Diadophis regalis regalis (B. 5? G.) Regal Rjng'necked Snake 

 Light ring on neck usually rather wide; Ariz. 



Diadophis regahs laetus (Jan.) Arizona Ring'necked Snake 

 (Diadophis regahs arizonae Blanchard) 



203. Dark color of back usually completely covering all but the first row of 



scales up on each side 204. 



Dark color of back usually not completely covering all but the first row 



of scales up on each side 205. 



204. With 17 rows of scales anteriorly; Cal. 



Diadophis amahihs modestus (Bocourt) Los Angeles Ring' 



necked Snake 

 With not more than 15 rows of scales around body; S. Cal. 



Diadophis amahihs simihs Blanchard San Diego Ring'necked 



Snake 



205. First row of scales on each side without dark markings; Cal. and S. 



Oregon 



Diadophis amahihs pulcheUus (B. 6? G.) Eldorado Ring'necked 

 Snake 

 First row of scales on each side with small, dark markings 206. 



206. With 17 rov/s of scales anteriorly; belly scarcely spotted; Cal. 



Diadophis amahihs vandenhurghi Blanchard Van Denburgh's 

 Ring-necked Snake 

 Usually with not more than 15 rows of scales; belly often spotted 207. 



207. Light ring on neck usually over one and one-half scales wide; belly 



lightly spotted; Cal. to Wash, and Idaho 



Diadophis amahihs occideyitahs Blanchard Western Ring- 

 necked Snake 

 Light ring on neck usually under one and onC'half scales wide, often in' 

 terrupted on the mid-dorsal line; belly well spotted; Cal. 



Diadophis amahihs amahihs (B. 6? G.) San Jose Ring'necked 

 Snake 



208. With 15 rows of scales around the posterior end of the body before the 



anus; back uniformly dark or with dark blotches; belly grayish or yel' 



lowish 209. 



With 11 to 13 rows of scales around the posterior end of the body; color 



may be similar or not 211. 



418 



