152 



1. Rostral almost as broad as deep; 

 ventrals 133 — 151; subcaudals 



12 — 23 21. C. Icucogaster p. 164. 



2. Rostral as broad as deep ; ventrals 



178; subcaudals 26 22. C.quinquetaeuiata p. 164. 



3. Rostral slightly more broad than 



deep: ventrals 247; subcaudals 14. 23. C. albopunclata p. 165. 

 XX Frontal more than twice as broad as the 

 supraocular. 



1. Ventrals 143 — 152; subcaudals 24 — 29. 24. C. bicolor p. 165. 



2. Ventrals 147 — 155; subcaudals 23. . . . 25. C. brookci p. 166. 



3. Ventrals 154; subcaudals 10 26. C. sondaica p. 166. 



4. Ventrals 182 — -210; subcaudals 9 — 19. . 27. C. brachyura p. 167. 



5. Ventrals 232 — 265; subcaudals 10 — 30. 28. C. collaris p. 167. 



b. K praeocular; no postocular 29. C. later alls p. 168. 



c. A praeocular; two postoculars 30. C. beccarii p. 168. 



d. No praeocular. 



1. Ventrals 142; subcaudals 29; uniform yel- 

 lowish inferiorly 31. C. rebentisclii p. 169. 



2. Ventrals 150 — 152; subcaudals 22 — 23; tail 



with a dark median streak below 32. C. ccramensis p. 169. 



3. Ventrals 187 — 194; subcaudals 14 — 16: ven- 

 trals with blackish spots on their outer ends. 33. C. mcchcli p. 169. 



BB. Frontal as broad as long. 



t First lower labial in contact with its fellow, 

 rta. Rostral as broad as deep; ventrals 157; 



subcaudals 22 34. C. piclcli p. 170. 



bb. Rostral more broad than deep. 



1. Praeocular present; ventrals 136 — 171; 



subcaudals 19 — 45 35. C, Icucocephala p. 171. 



2. No praeocular; ventrals 135 — 174; sub- 

 caudals 21 — 38 36. C. agamensis p. 171. 



cc. Rostral more deep than broad. 



1. Ventrals 140; subcaudals 27 37. C. semiaiintdata p. 172. 



2. Ventrals 164; subcaudals 22 38. C. doderleini p. 172. 



It Mental in contact with the chin-shields, 



1. Praeocular present; ventrals 170; sub- 

 caudals 22 39. C. bungaroides p. 173. 



2. No praeocular; ventrals 138; subcaudals 33. 40. C. schlegcli p. 173. 

 II. Four upper labials, second and third entering 



the eye. 

 a. Frontal more long than broad. 



I Mental in contact with the chin-shields. 



