342 COLTJBKIDjE. 



Synopsis of Indian, Ceylonese, and Burmese Species. 



A. 19 rows of scales. 



a. Internasals broadly truncated anteriorly, 



trapezoid. 



'. Scales faintly or feebly keeled; 3 la- 

 bials entering the eye. , 

 a". 154-168 ventrals ; 96-122 subcaudals. T. modestus, p. 343. 

 b". 177-235 ventrals ; 75-107 subcaudals. T. platyceps, p. 343. 

 V. Scales strongly keeled. 



a". Eye moderate, diameter (in adults) 

 nearly equalling distance from nos- 

 tril ; 3 labials entering eye. 

 a. Scales of outer vow smooth. 



a'. 150-154 ventrals ; 80-100 sub- 

 caudals T. khasiensis, p. 344. 



p. 131-150 ventrals; 65-75 sub- 

 caudals T. beddomii, p. 344. 



|3. Scales of outer row keeled ; 160- 



175 ventrals ; 73-95 subcaudals. . T. parallelus, p. 345. 

 b". Eye large ; scales of outer row keeled ; 

 3 labials entering eye. 



a. Two anterior temporals T. chrysargm, p. 345. 



/3. One anterior temporal T, niyrocinctus, p. 346. 



c". Eye rather large, diameter exceeding 

 distance from nostril ; scales of outer 

 row smooth or very feebly keeled, 

 a. Two labials entering eye. 



a'. 133-141 ventrals ; 48-54 subcau- 

 dals T. -ceylonensis, p. 346. 



j8'. 158-170 ventrals; 79-90 subcau- 

 dals T. ftima lay anus, p. 347. 



/3. Three labials entering eye. 



a'. Frontal shorter than parietals ; 

 132-166 ventrals; 68-87 sub- 

 caudals T. subminiatm, p. 347. 



|3'. Frontal as long as parietals ; 134- 



142 ventrals ; 80-92 subcaudals. T. monticola, p. 348. 



b. Internasals much narrowed anteriorly, 



subtriangular ; frontal longer than dis- 

 tance from end of snout, as long as parie- 

 tals or slightly shorter. 

 a'. Two or three labials entering eye. 

 a". Scales of outer row smooth ; normally 

 a single anterior temporal, and 3 



labials entering eye T. stolatus, p. 348. 



b''. Scales of outer row smooth ; nor- 

 mally 2 anterior temporals, and 2 



labials entering eye T. piscator, p. 349. 



c". Scales of outer row keeled ; a single 

 anterior temporal ; 3 labials entering 



eye ^ T. beliulus, p. 350. 



b'. A single labial entering eye ; 2 anterior [p. 350. 



temporals T. sancti-johannis, 



B. 17 rows of scales, smooth or faintly keeled. . T. punctulattis, p. 350. 



C. 23-27 rows of scales T. plumbicolor, p. 351. 



