103. ABLABES. 285 



eight (or seven) upper labials, third, fourth, and fifth (or third and 

 fourth) entering the eye ; four lower labials in contact with the 

 anterior chin-shields, which are slightly longer than the posterior. 

 Scales in 13 rows. Ventrals 114-122; anal divided; subcaudals 

 77-103. Lustrous dark brown or black above, with three yellowish 

 longitudinal lines lost on the hinder half of the body ; the vertebral 

 line beginning behind the nape, the laterals widening anteriorly and 

 descending obliquely with their black borders towards the throat ; 

 a yellow chevron-shaped collar, pointing backwards ; the black of 

 the upper surface of the head descending as a triangular patch on 

 the temple ; eye bordered with black ; upper labials yellowish, with 

 a few small black spots ; lower parts uniform yellowish white. 



Total length 430 millim. ; tail 170. 



Borneo, Sumatra, Pinang. 



a-6. cJ (V. 118, 116; Rejang River, Sarawak. BrookeLow,Esq.[P.]. 

 0. 84, 77). 



c. d (V. 117 ; C. 93). Rejang River. Rajah Brooke [P.]. 



d. d' (V. 122 ; C. ?). Mt. Batu-Song, Sara- C. Hose, Esq. [C.T. 



wak, 2000 ft. 



The following snake is perhaps to be regarded aa a variety of 

 A. longicauda ; the description is, unfortunately, insuiRcient, and 

 the figure represents the animal with a vertical pupil : — 



DiADOPHis BiPUNCTATtrs, V. lAdth de Jeude, in M. Weher, Zoo!. 

 Ergehn. p. 184, pi. xvi. fig. 9 (1890). 



One prse- and two postoculars ; temporals 1 -|- 2 ; seven upper 

 labials, third and fourth entering the eye. Scales in 13 rows. 

 Ventrals 117 ; subcaudals 90. Upper parts dark brown, lower 

 parts yellow, without stripes or spots ; head and neck black ; two 

 small white spots on the parietal shields ; three yellow cross bands 

 on each side of the neck, the first pair meeting in the middle and 

 forming a coUar, the third not clearly marked ; a yellow spot behind 

 and under the orbit ; the three anterior upper labials partly yellow, 

 partly black ; a triangular black spot at each end of the ventral and 

 caudal shields, close to the outer row of scales, the spots forming 

 a continuous black line along each side of the belly. 



Kaju Tanam, Sumatra. 



12. Abla'bes nicobariensis. 



Ablabes nicobariensis, StoUczka, Journ. As. Soc. Beng. xxxix. 1870, 

 p. 184, pi. xi. fig. 1 ; Boukng. Faun. Ind., Rept. p. 807 (1890). 



Eostral low, wide, not reaching the top of the head ; nostril 

 between two nasals ; internasals about half the size of the pras- 

 frontals ; frontal somewhat larger than the supraoculars ; parietals 

 about one fourth larger than the frontal, in contact with both post- 

 oculars ; loreal united with the postnasal ; one pras- and two post- 

 oculars ; temporals 1 -f- 2 ; upper labials seven, third and fourth 



