298 



COLUBKID^. 



from above ; sutiire between the intern asals very short ; praefrontal 

 usually single ; frontal longer than its distance from the end of the 

 snout, two thirds or three fourths the length of the parietals ; 

 loreal longer than deep ; one prae- and one postocular ; temporals 

 1 + 2 ; six upper labials, third and fourth entering the eye, first 

 smallest, sixth largest ; four lower labials in contact with the ante- 

 rior chin-shields ; posterior chin-shields small. Scales in 13 rows ; 

 those on the sides of the anal and basicaudal regions obtusely keeled 

 in the male. Ventrals 150-162 : anal divided ; subcaudals 33-42. 

 Dark brown or black above and below, with or without more or less 

 indistinct lighter longitudinal streaks above. 



Total length 510 millim. ; tail 60. 



Eastern Himalayas ; Khasi Hills ; Rangoon ? 



a, b-c. S (V. 151 ; C. 39) & $ Nepal. 



(V. 160, 158; C. 36,36). 

 d-e. $ (V. 162, 155; C. 34, Nepal. 



37). 

 /. S (V. 154 ; C. 42). Sikkim. 



//. ? (V. 160 ; C. 37). Sikkim. 



h-h. 5 (V. 161 ; C. 33) & vg. Darjeeling. 



(V. 158, 159; C. 36,37).' 

 I. S (V. 150 ; 0. 39). Darjeeling. 



m-iJ. S (V. 158; C. 38), $ Darjeeling. 



(V. 162; C. 36), and yg. 



(V. 169, 158) ; C. 35, 39). 

 q. Hgr. cJ (V. 150 ; C. 41). Khasi Hills. 



B. H. Hodgson, Esq. 



[P.]. 

 E. India Comp. [P.]. 



Sir J. Hooker [P.]. 



(Type of T. ritgosum.) 



Messrs. v. Schlagir- 



tweit [C.]. 

 T. C. Jerdon, Esq. 



[P.]. 

 W. T. Blanford, Esq. 



[P.]- 

 Col. Beddome [C.]. 



T. C. Jerdon, Esq. 

 [P.]. 



2. TrachiscMum guentheri. (Plate XIX, fig. 1.) 



Tracliischium obscuro-striatum {non Blyth), Giinth. Proc. Zool. Soc. 



1860, p. 161. 

 gueutheri, Bouleng. Faun. Ind., Rq)t. p. 285 (1890). 



Rostral as broad as deep or a little deeper than broad, visible 

 from above ; suture between the internasals very short ; prae- 

 frontal usually single ; frontal longer than its distance from the 

 end of the snout, two thirds the length of the parietals ; loreal 

 longer than deep ; one prae- and one postocular; temporals l-|-2; 

 six upper labials, third and fourth entering the eye, first smallest, 

 sixth largest ; four lower labials in contact with the anterior chin- 

 shields ; posterior chin-shieMs small. Scales in 13 rows ; male 

 with keeled scales in the anal and basicaudal regions. Ventrals 

 132-145 ; anal divided ; subcaudals 33-38. Dark brown above, 

 with indistinct lighter and darker longitudinal streaks ; yellowish 

 beneath, uniform or scantily mottled with brown. 



Total length 280 millim. ; tail 35. 



Sikkim. 



