10. TROPIDONOTUS. 197 



5. Scales in 29 to 33 rows. 



Eye separated from the labials by subocu- 



lars 46. cyclopium, p. 244. 



Fourth labial entering the eye 47. tcuvisjpilotus, p. 245. 



III. Maxillary teeth not more than 30, last two or three abruptly 

 enlarged. (Amphiesjia.) 



A. Head moderately elongate. 



1. Scales in 17 rows, smooth. 



Rostral nearly as broad as deep ; eye rather 



small 48. sexlineatus, p. 246. 



Uostral much broader than deep ; eye rather [p. 246. 



lai'ge 49. dolicliocercus, 



2. Scales in 19 rows, smooth or feebly keeled. 



2 labials entering the eye ; frontal once and 



a half as long as broad .50. sfinnpffii, p. 247. 



2 labials entering the eye ; frontal once and 



two thirds to twice as long as broad. . . . 51. lateralis^ p. 248. 



3 labials entering the eye 52. platycejis, p. 248. 



3. Scales in 19 rows, strongly keeled. 

 a. Two labials entering the eye. 



a. 7 upper labials, 3rd and 4th entering the eye ; usually 

 a single anterior temporal. . 53. tigrinus, p. 249, 



(3. 8 upper labials, 4th and 5th entering the eye ; usually 

 two anterior temporals. 



Subcaudals 121-128 54. jjvT/eri, p. 250. 



[p. 251. 



Subcaudals 79-90 55. MmaJayanus, 



Subcaudals 48-54 56. ceylonensis, p. 252. 



h. Three labials entering the eye. 



a. A single anterior temporal. 



* Outer row of scales smooth. 



t Internasals broadly truncated anteriorly. 



57. beddomii, p. 252. 



ft Internasals much narrowed anteriorly. 



3rd to 5th labials entering the eye 58. stolatus, p. 253. 



4th to 6th labials entering the eye 59. vittatus, p. 255. 



