156 scixciD^. 



b. Subdigital lamellte smooth. 



a. Auterior lorcal usually deeper tlian the second. 



34 to 36 scales round the body, dorsals 

 tri- or quinquecariiiate ; supranasals in 

 contact behind the rostral ; three light, 

 black-edged dorsal bands 31. vertehralis, p. ISO. 



30 to 3-1 scales round the body, dorsals 

 tri- or quinquecarinate ; supranasals 

 rarely in contact ; six supraciliaries ; a 

 light dorso-lateral baud 32. carinata, p. 181. 



20 to 31) scales round the body, dorsals 

 quinque- or septemcarinate ; five supra- 

 ciliaries ; the adpressed limbs meet or 

 slightly overlap 33. macularia, p. 182. 



26 to 28 scales round the body, dorsals 

 tri- or quinquecarinate ; five supracili- 

 aries ; the hind limb reaches at least 

 as far as the elbow 34. brevis. p. 183. 



/3. Anterior loreal not deeper than the second ; dorsal and 

 lateral scales very strongly keeled. 



26 scales round the body, dorsals quin- 

 quecarinate ; frontonasal broader than 

 long 35. rugifera, p. 184. 



28 to 30 scales round the body, dorsals 

 quinque- or sei^temcarinate ; fronto- 

 nasal as long as broad 36. multicarinata, p. 185. 



2. A postnasal, separated from the nasal by a suture just behind 

 the nostril. 



30 to 34 scales round the body, dorsals 



tri- (rarely quinque-) carinate ; the ad- 

 pressed hind limb does not reach the 



axilla 37. miiltifasciata, p. 186. 



26 scales round the body, dorsals feebly 



trioarinate 38. tytleri, p. 187. 



30 to 32 scales round the body, dorsals 



and laterals very" strongly tricarinate ; 



the hind limb reaches the axilla, or 



beyond 39. rudis, p. 188. 



C. Dorsal scales smooth or bicarinate. 

 26 or 28 scales round the body 40. siamensis, p. 188. 



