COLUBRID^. 



279 



Series A. A GLYPH A. 



Subfamily I. COLUBRIN^. 



Postfroutal bone not produced over the suprateniporal region. 

 Scales imbricate. 



Head-shields and ventrals large. 



Si/nopsis of Indian Genera *. 



A. Terrestrial or arboreal Snakes, Avith the 

 hypapophyses developed otdy on the 

 anterior half of the vertebral column, 

 and the nasal bones at least as large as 

 the prsefrontals. 

 a. Posterior border of ventral shields -with- 

 out lateral notch. 

 a'. Anterior mandibular teeth longer 

 than the posterior : eye small or 

 ratlier small. 

 a". No internasal or temporal shields. Calamabia, p. 281. 

 h". One or two interiiasals : temporals 

 present. 

 a. Posterior maxillary teeth a little 

 longer than the anterior ; pupil 

 vertically subelliptic ; sub- 

 caudals in two rows. 

 «'. A loreal and a prreocular . . Trachischium, p. 284. 

 /3'. No loreal or projocular .... Blythia, p. 287. 

 /3. Maxillary teeth equal in length ; 

 pupil round: subcaudals single. 



a.' Scales smooth Aspidura, p. 288. 



^'. Scales keeled Haplocercus, p. 290. 



y. Anterior maxillary teeth en- 

 larged ; pupil vertically elliptic. Lycodox, p. 291. 

 b'. Mandibular teeth subequal in 

 length, maxillary teeth equal, or 

 posterior largest. 

 «". Eve very small, with round pupil ; 



' tail very short Xyi.ophis, p. 283. 



b". Eye with vertically elliptic pupil ; 

 tail long. 

 a. Eve large ; ventrals strongly 



"keeled '. '. Hydrophobus, p. 297. 



/3. Eye small ; ventrals not keeled. Pseudocyclophis, p. 209. 

 y. Eve moderate ; nostril an oblique 



'slit between two nasals Lytorhynchus, p. 322. 



* Through the kind mediation of Mr. W. L. Sclater I have obtained from 

 the Trustees of tlie Indian Museum communication of the types of Theobald's 

 Falconcria bcnyalensis and CaJmiis cnneiformif. The fjrmer is a North- 

 American Suake, Conoeephaliis sfriafiihis, the latter a South-African, ComncUa 

 cana. 



