148. DIPSADOMOEPHUS. 65 



•Anterior palatine teeth scarcely larger than the posterior ; anterior 

 mandibular teeth feebly enlarged. Eostral a little broader than 

 deep, scarcely visible from above ; internasals broader than long, 

 much shorter than the prsefrontals ; frontal as long as broad or 

 slightly longer than broad, as long as its distance from the end of 

 the snout, shorter than the parietals ; loreal as long as deep or 

 deeper than long ; one or two prseoculars, not extending to the 

 upper surface of the head j two postoculars ; temporals 2+3; 

 eight upper labials, third, fourth, and fifth entering the eye ; four 

 or five lower labials in contact with the anterior chin-shields ; 

 posterior chin-shields as long as the anterior and in contact with 

 each other. Scales in 21 rows, the vertehral row strongly enlarged. 

 VentraJs 224^225 ; anal entire ; subcaudals 87-94. Yellowish 

 brown above ; head with an arrow-shaped brown, black-edged 

 marking, longitudinally bisected ; a black streak on each side of the 

 head, passing through the eye; a yellowish vertebral streak; a 

 series of erect Y-staped markings on each side of the back ; lower 

 parts yellowish, with a series of brown spots along each side. 



Total length 830 millim. ; tail 170. 



Bengal, Assam, Pinang. 



«. $ (V. 224 ; 0. 94). Bengal. Gen. Hardwioke [P.]. ^Type.) 



b. ? (V. 225 ; 0. 87). Pinang. Dr. Cantor [C.]. 



4. Sipsadomorphns hexagonotns. 



Dipsas hexagonotus, Blyth, Journ. As. Soc. Beng. xxiv. 1856, p. 360 ; 



Stoliczka, Journ. As. Soc. Beng. xxxix. 1870, p. 198, pi. xi. fig. 4, 



and xl. 1871, p. 439 ; Theoh. Cat. Bept. Brit. Ind. p. 195 (1876) ; 



Bouleng. Faun. Ind., Bept. p. 361 (1890). 

 ochracea, Giinth. Ann. 8f Mag. N. S. (4) i. 1868, p. 425; 



Theob. Journ. Linn. Soc. x. 1868, p. 53, and I. c. p. 196. 

 hexagonata, part., Anders. Froc. Zool. Soc. 1871, p. 185. 



Anterior palatine teeth scarcely longer than the posterior ; 

 anterior mandibular teeth considerably enlarged. Eostral broader 

 than deep, just visible from above ; internasals broader than long, 

 shorter than the prsefrontals ; frontal a little longer than broad, as 

 long as its distance from the end of the snout, considerably shorter 

 than the parietals ; loreal as long as deep or deeper than long ; one 

 prsBOCular, not reaching the upper surface of the head ; two post- 

 oculars ; temporals 2 + 3; eight (rarely nine) upper labials, third, 

 fourth, and fifth (or fourth, fifth and sixth) entering the eye ; four 

 or five lower labials in contact with the anterior chin-shields, which 

 are as long as or a little shorter than the posterior. Scales in 19 or 

 21 rows, vertebral row strongly enlarged. Ventrals 218-250 ; 

 anal entire ; subcaudals 94^140. Dusky grey, reddish, or ochraceous 

 above, uniform or with ill-defined blackish transverse lines ; a more 

 or less distinct dark streak from eye to gape ; lower parts yellow, 

 uniform, or clouded with pale brownish in the young. 



Total length 1050 millim. ; tail 200. 



Eastern Himalayas, Bengal, Burma, Andamans. 

 VOL. m. ^ 



