PLATE IV 



Amphibia and Reptilia of Colorado 



Fig. it.— T ha mm phis radix. Plains Fio. i&.—Thamnopkis radix. Plains Gar- Fig. 19. — Thamnothis parietaKi 



Garter Snake (page 88). ter Snake: 1, Genial; 2, Post- Red-barred Garter Snake 



genial (page 88). (page 86). 



Fig. 20.— Thamnnphis radix. Plains Garter Snake ( 



Fig. 21. — Diadophis regalis. Sonoran Fig. 22. — Diadophis regalis. Sonoran Fig. 23. — Ophibolus doliatus gentilis 

 Ring-necked Snake (page 101). Ring-necked Snake (page 101). Red King Snake (page 91). 



