378 



COLUBEIDa;. 



5. Zaocys fuscus. (Plate XXVII. fig. 2.) 



Coryphodon fuscus, Giinth. Cat. p. 112 (1868). 

 ? Herpetodryas horneri, Jan, Menco, p. 80 (1863). 

 Zaocys fuscus, Giinth. Rept. Brit. Ind. p. 256 (1864). 



Rostral a little broader than deep, visible from above ; internasals 

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

 long as its distance from the rostral or the end of the snout, a little 

 shorter than the parietals ; three loreals ; one praeocular, with one 

 or two small suboculars below it ; two postoculars ; temporals 2 + 2 ; 

 nine upper labials, fifth and sixth entering the eye ; five lower 

 labials in contact with the anterior chin-shields, which are much 

 shorter than the posterior. Scales smooth, in 16 rows. Ventrals 

 1!:<9-198 ; anal divided; suboaudals 163-165. Olive above, 

 yellowish inferiorly ; a black lateral band along the posterior part 

 of the body and along the tail, extending to the outer ends of the 

 ventral and subcaudal shields. 



Total length 2900 millim. ; tail 1000. 



Borneo and Sumatra. 



a. cJ (V. 105 ; C. 163). Borneo. ) ,rp . 



b. Hgr, S (V. 192 ; C. 165). Borneo. Sir E. Belcher [P.]. f ^^^'S^^-l 



c. d. c? (V. 189, 198 ; C. Nias. Hr. Sundermann [0.]. 

 164, ?). 



.=. <S (V. 195 ; C. ?). ? Dr. Bleeker. 



6. Zaocys tenasserimensis. 



Zaocys tenasserimensis, W. L. Sclater, Journ. As. Soc. Beiig. Ix. 

 1891, p. 238, pi. vi. fig. 3. 



Rostral as broad as deep, just visible from above ; internasals 

 shorter than the prefrontals ; frontal longer than broad, longer than 

 its distance from the end of the snout, shorter than the parietals ; 

 three loreals ; one prseocular, with a subooular below it ; two post- 

 oculars ; a single pair of long, superposed temporals ; seven or eight 

 upper labials, fourth or fifth entering the eye ; five lower labials in 

 contact with the anterior chin-shields, which are equal to the poste- 

 rior. Scales smooth, in 16 rows. Ventrals 201 : anal divided ; 

 subcaudals 123. Black above, greenish olive on the head ; ante- 

 riorly with traces of a white vertebral line; in the middle part of 

 the body a series of ill-defined white transverse bauds bordered 

 with black posteriorly ; on the hinder part of the body the bands 

 are gradually transformed into seven longitudinal series of white 

 spots separated by a black network ; below yellowish, the outer 

 edges of the ventrals dusky, tail with a median dusky streak. 



Tenasserim. 



