128 



B. Scales in 15 rows. 

 I. Anal entire. 



a. Nasal divided. 



1. Internasals in contact 4. C cveretti p. 130. 



2. Internasals separated 5. 6*. petronellac p. 131. 



b. Nasal undivided 6. f. propinquns p. 131. 



11. Anal divided. 



a. No internasals. 



1. Nasal divided; two postoculars; sub- 



caudals 30 1-0. pukherrumis p. 132. 



2. Nasal undivided; one postocular; sub- 



caudals 37 8. O. praefrontalis p. 132. 



b. A pair of internasals. 



1. Nasal divided; subcaudals 54 9. C. vertehraUs p. 133. 



2. Nasal undivided or partly divided; sub- 

 caudals 21 — 28 10. (9. -waafidersi p. 133. 



I. Oligodon bitorquatus Boie. 



OUgodon bitorqjiatJis^ Boie, Isis 1827, p. 519. 



Oligodon bitorquatus^ Boulenger, Cat. Sn. II 1894, p. 237 (s. syn.). 



Rostral visible from above; nasal divided; suture between 

 the internasals shorter than that between the praefrontals; 



O.TObbei. 



Fig. 53. Oligodon bitorquatus Boie. Nat. size. Side view of head; ventral shields. 



frontal longer than its distance from the tip of the snout, as 

 long as or shorter than the parietals; loreal more long than 



