198 COLTTBEID^. 



** Outer row of scales keeled ; 4th and 6th labials 

 entering the eye 60. nigrocinctus, p. 255. 



/3. Two anterior temporals. 



* Eye moderate or large. 



t Frontal shorter than parietals. 



J Internasals shorter than praBfrontals ; outer row 

 of scales smooth or feebly keeled. 



3rd to 5th labials entering the eye 61. suhminiatus,'^.25Q. 



4th to 6th labials entering the eye 62. sjiilogaster, p. 257. 



+t Internasals as long as prsefrontals ; outer row 

 of scales keeled .... 63. cJirysarcfus, p. 258. 



tt Frontal as long as parietals. 



64. monticola, p. 259. 



** Eye very large ; subcaudals 95-113. 



66. maculatus, p. 260. 



4. Scales in 21 rows 66. cJirysarcfoides, 



[p. 260. 



B. Head short, very distinct from neck. 



1. Scales in 17 rows, all strongly keeled; 3rd to 5th labials 



entering the eye. 



Internasals not longer thau praefrontals .. 67. saravacemsiSjTp. 261. 

 Internasals longer than prtefrontals 68. auriculatus, p. 261. 



2. Scales in 19 rows, all strongly keeled. r ogo 



Subcaudals 96-101 69. orebripunctatus, 



Subcaudals 66 70. lineatiis, p. 262. 



3. Scales in 19 or 21 rows, outer row smooth or feebly keeled. 



Scales in 19 rows ; two labials entering 



the eye 71. flavifrons, p. 263. 



Scales in 21 rows j three labials entering 



the eye 72. callistus, p. 263. 



lY. Maxillary teeth 35-40, posterior but slightly enlarged ; eye 

 very large ; body very slender. (Maceopophis.) 



6th and 6th labials entering the eye ; ven- 



trals 196 73. Jiypomelas, p. 26 1. 



4th to 6th labials entering the eye; ven- 



trals 157 74. dendrojihiops, 



[p. 264 



