342 COLTJBEIDJE. 



Synopsis of Indian, Ceylonese, and Burmese Sjc>ecies. 



A. 19 rows of scales. 



a. lutornasals broadly trimcated anteriorly, 

 trapezoid. 

 a'. Scales faintly or feebly keeled ; 3 la- 

 bials entering the eye. 

 a". ir)4-168 ventrals ; 96-122 subcaudals. T. modestns, p. 343. 

 b". 177-235 ventrals ; 75-107 subcaudals. T. i^latyceps, 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 row smooth. 



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

 caudals T. khasicnsis, p. 344. 



/3'. 131-150 ventrals; 65-75 sub- 

 caudals T, heddomii, p. 344. 



/3. Scales of outer row keeled ; 100- 



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

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

 3 labials entering eye. 



a. Two anterior temporals T. c/irysarytis, p. 345. 



(3. One anterior temporal T, nigrocindus, 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. 340. 



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

 dals T. /lima lay anus, p. 347. 



|S. Three labials entering eye. 



a'. Frontal shorter than parietals ; 

 132-160 ventrals; G8-87 sub- 

 caudals T, snhminiatns, 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. stolatuft, 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. hcUidus, p. 350. 



V , A single labial entering eye ; 2 anterior [p. 350. 



temporals T. mncti-johannis, 



B. 17 rows of scales, smooth or faintly keeled. . T. jmncfa/afus, p. 350. 

 0. 23-27 rows of scales T. phrmbicolor, p. 351. 



