132 



Fox Snake. Page 161. 



Top of head not coppery. 10. 



10. Belly reddish or salmon-colored. 11. 

 Belly not reddish. 13. 



11. Uniform color below, without markings. 12. 



With two rows of black spots below. No. 6. Clonophis kirtlandi (Kenn.). 

 Little Red Snake. Page 140. 



12. Three pale spots on back of head; scales keeled. No. 4. Storeria occipito- 



maculata (Storer). Red-bellied Snake. Page 136. 

 Yellow band around neck; scales smooth. No. 18. Diadophis punctatus (L.). 

 Ring-necked Snake. Page 171. 



13. Stripes above, but no large spbts nor blotches. 14. 

 Above with stripes and spots or spots alone. 18. 



14. Yellowish below. 15. 

 Greenish below. 16. 



15. Belly w'ith two brown bands;, lower row of scales smooth. No. 10. Regina 



leberis (L.) Striped Water Snake. Page 150. 

 Belly blotched; scales all keeled. No. 9. Regina rigida (Say). Rigid Queen 

 Snake. Page 150. 



16. Dots bordering dorsal stripes. No. 5. Storeria dekayi (Holb.). Rock Snake. 



Page 138. 

 Dots not bordering dorsal stripes. 17. 



17. Lateral stripe on third and fourth rows of scales. No. 7. Thamnophis sau- 



rita. (L.). Ribbon Snake. Page 141. 

 Stripe on second and third rows of scales. No. 8. Thamnophis sirtalis (L.). 

 Garter Snake. Page 143. 



18. Scales smooth. 19. 

 Scales rough. 21. 



19. Markings grayish with scattered minute black dots. No. 2. Virginia Valerias. 



(B. & G.). Valeria's Snake. Page 135. 

 Markings in the form of spots or blotches. 20. 



20. Black, with small yellowish spots or narrow yellowish lines. No. 19. Lam- 



pro'peltis getulus sayi (Holb.). King Snake. Page 174. 

 Grayish, with brown blotches. No. 20. Lampropeltis doliatus triangulus 

 (Boie). House Snake. Page 174. 



21. Spots not distinct; blackish; scales white-edged. No. 12. Callopeltis obso- 



letus (Say). Pilot Snake. Page 157. 

 Spots distinct. 22. 



22. Ground color whitish. No. 17. Pituophis melanoleucus (Daudin), Pino Snake. 



Page 171. 

 Ground color dark. 23. 



23. Belly blotched. No. 11. Natrix sipedon (L.). Spotted Water Snake. Page 152. 

 Belly not blotched. 24. 



24. Stripes and squarish spots. No. Sa. Thamnophis sirtalis sirtalis (L.). Striped 



Garter Snake. Page 141. 

 Spots, but no stripes. No. 8b. Thamnophis sirtalis ordinatus (L.). Spotted 

 Garter Snake. Page 143. 



25. With no rattles at end of tail. No. 22. Agkistrodon contortrix (L.). Cupper- 



head Snake. Page 186. 

 With rattles aJt end of tail. 26. 



26. Blotches on back in seven series; rattles small. No. 23. Sistrurus catenatus 

 . (Rafin.). Prairie Rattle Snake. Page 190. 



Blotches on back in three rows, forming zigKag cross-'blotches; rattles large 

 No. 24. Crotalus horridus (L.). Common Rattle Snake. Page 191. 



