^ COLUBEID^. 



Synopsis of the Genera. 

 I. Ventrals without keels. 



A. I^asals in contact. 



1. Ventrals well developed. 



Scales smooth ; parietal shields well developed. 



124. HypsirMna, p. 2. ^ 



Scales keeled ; parietal shields well developed ; head very distinct 

 from neck 125. Homalopsis, p. 13. 



Scales keeled ; parietals more or less broken up into scales ; head 

 not very distinct from neck 126. Cerberus, p. 15. ~- — 



2. Ventrals very narrow ; scales smooth. 



127. Eurostus, p. 19. 



B. Nasals separated by an internasal. 



loreal present; scales keeled 128. Myron, p. 19. 



Loreal present ; scales smooth ; body moderately elongate. 



129. Gerardia, p. 20. 

 Loreal absent ; scales smooth ; body stout. 



130. Pordonia, p. 21 



Loreal present ; scales smooth ; body extremely elongate. 



131. Cantoria, p. 23. 



II. Ventrals bicarinate, very narrow. 



Scales smooth 132. Hipistes, p. 24. 



Scales keeled ; two rostral appendages. 133. Herpeton, p. 25. 



124. HYPSIRHINA. 



Hydrus, part., Schneid. Syst. Amph. i. p. 233 (1799). 



Hypsirhina, Wagl. Syst. Amph. p. 169 (1830) ; Gray, Zool. Misc. 



p. 66 (1842), and Cat. 8n. p. 71 (1849) ; Gilnth. Sept. Brit. Ind. 



p. 280 (1864) ; Smdeng. Faun. Ind., Sept. p. 375 (1890). 

 Homalopsis, part., Sehleg. Phys. Serp. ii. p. 332 (1837). 

 Ferania, Gray, II. cc. pp. 67, 66 ; Gilnth. I. u. p. 284. 

 Raclitia, Gray, II. cc. pp. 67, 79. 

 Miralia, Gray, U. cc. pp. 68, 79. 

 Phytolopais, Gray, Cat. p. 67. 

 Hypsiscopus, Gray, I. c. p. 72. 

 Trigonurus, Bum. Sf Bibr. M6m. Ac. 8c. xziii. 1853, p. 498, and Erp. 



G4n. vii. p. 959 (1854). 

 Hypsirhina, part., Bum. 8/- Bibr. U. cc. pp. 498, 945 ; Jan, Arch. Zool 



Anat. Phys. iii. 1865, p. 258. 

 Eurostus, part., Bum. 8f Bibr. II. cc. pp. 498, 951. 

 Tachyplotus, Reinh. Vidensk. Meddel. 1866, p. 161. 

 Feranoides, Carlleyle, Journ. As. Soc. Beng. xxxviii. 1869, p. 196. 

 Pythonopsis, Peters, Man. Berl. Ac. 1871, p. 576. 

 Homalophia, Peters, I. c. p. 577. 

 Pseudoferania, Bouglas Ogilby, Proc. lAnn. Soc. N. S. W, (2) v. 1890, 



p. 61. 



