1038. 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. 
Seales 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 
desvending obliquely with their black borders towards the throat ; 
a yellow chev ron-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-b. 3 (V. 118, 116; Rejang River, Sarawak. BrookeLow,Esq.[P. ]}. 
C. 84, 77). 
ce. 6 (V. 117; C. 93).  Rejang River. Rajah Brooke [P. ]. 
d. 3 (V. 122; Can): Mt. Batu-Song, Sara- OC. Hose, Esq. [C.]. 
wak, 2000 ft. 
The following snake is perhaps to be regarded as a variety of 
A. longicauda; the description is, unfortunately, insufficient, and 
the figure represents the animal with a vertical pupil :— 
DIADOPHIS BIPUNCTATUS, v. Lidth de Jeude, in M. Weber, Zool. 
Lirgebn. p. 184, pl. xvi. fic, 9 (1890). 
One pre- 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 collar, 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. Ablabes nicobariensis. 
Ablabes nicobariensis, Stoliezka, Journ. As. Soc. Beng. xxxix. 1870, 
p- 184, pl. xi. fig. 1; Bouleng. Faun. Ind., Rept. p. 807 (1890). 
Rostral low, wide, not reaching the top of the head; nostril 
between two nasals; internasals about half the size of the pre- 
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 pre-and two post- 
oculars ; tempcrals 1+2; upper labials seven, third and fourth 
