PLATE IV 

 Amphibia and Reptilia of Colorado 



Fig. i7^Thamnoplns radix. Plains Fig. i&.— Thamnopkis radi.r. Plains Gar- 

 Garter Snake (page 88). ter Snake: i, Genial; 2, Post- 

 genial (page 88). 



Fig. ig. —Thamnop/iis parieldis 



Red-barred Garter Snake 



(page 86). 



Fig. 20. ^T ham no phis radix. Plains Garter Snake (page 88). 



^'%^i^aZZ*l^'l^i'\''^f"- S°"°'''''" Fig 2 2.— Diado phis regalis. Sonoran Fig. 2^.-Ophibolus doliatus gentilis 

 Rmg-necked Snake (page loi). Ring-necked Snake (page loi). Red King Snake (page 91). 



