278 



Synopsis of the Species. 



I. Scales in 15 rows. 



A. Scales feebly keeled 1. semicarinalus, p. 278. 



B. Scales smooth. 



1 . Seven or eight upper labials. 



a. Loreal present ; nasal divided or semidivided. 



Rostral as deep as broad or a little 



broader than deep ; anal divided .... 2. major, p. 279. 



Rostral as deep as broad ; anal entire . . 3. dorue, p. 279. 



Rostral much broader than deep 4. frenntus, p. 280. 



/3. Loreal present ; nasal single . 5. stoliczkce, p. 281. 

 y. No loreal ; nasal single. 



Snout twice as long as the eye 6. tricolor, p. 281. 



Snout not twice as long as the eye .... 7. calamaria, p. 282. 



2. Six upper labials ; nasal divided ; loreal present. 



8. rappii, p. 282. 



II. Scales in 13 rows. 



A. Tail not more than one third of the total length. 



Seven upper labials, third and fourth 



entering the eye 9. baliodirus, p. 283. 



Eight upper labials, fourth and fifth 



entering the eye 10. scriptus, p. 284. 



B. Tail more than one third of the total length ; subcaudals 77- 



103 11. longicanda, p. 284. 



III. Scales in 17 rows 12. nicobariensis, p. 285. 



1. Ablabes semicarinatus. 



Eurypholis semicarinatus, Hallow. Proc. Ac. Philnd. I860, p. 493. 

 Cyclophis nebulosua, Giinth. Ann. $ May. N. II. (4) i. 1868, 



p. 418, pi. xix. fig. C. 

 Ablabes semicarinatus, Bouleny. Proc. Zool. Soc. 1887, p. 148. 



Rostral a little broader than deep, just visible from above ; nasal 

 divided ; eye a little more than half the length of the snout ; suture 

 between the internasals much shorter than that between the prse- 

 frontals ; frontal as long as or a little longer than its distance from 

 the end of the snout, shorter than the parietals ; loreal about twice 

 as long as deep ; one pne- and two postoculars ; temporals 1 + 2 ; 

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



