]98 COLTJBRID^. 



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

 entering the eye (50. nigrocinctus, p. 1!55. 



ft. Two anterior temporals. 



* Eye moderate or large. 



t Frontal shorter than parietals. 



X Internasals shorter than proefrontals ; outer row 

 of scales smooth or feebly keeled. 



3rd to 5th labials entering the eye 61. suhminiatus,]).2b(j. 



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



JJ Internasals as long as procfrontals ; outer row 

 of scales keeled .... 03. chrysargus, p. 258. 



tt Frontal as long as jiarietals. 



04. monticoJa, p. 259. 



** Eye very large ; suLcaudals 95-113. 



65. maculatus, p. 260. 



4. Scales in 21 rows 66. chrysargoides^ 



[p. 260. 



E. Head short, very distinct from ueck. 



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



entering the eye. 



Internasals not longer than prcefrontals . . 67. safavacensis,^'.2Qtl. ' 

 Internasals longer than pnefrontals 68. auriculatus, p. 261'.- > 



2. Scales in 19 rows, all strongly keeled. 



a^j 



[p. 26^ 



Subcaudals 96-101 69. crehnjninctattis, 



Subcaudals 06 ■ 70. lineatus, 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. Jlavifrons, p. 263. 



Scales in 21 rows ; three labials entering 



the eye ' 72. callistus, p. 203. 



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

 very large ; body very slender. (Maceopophis.) 



5th and 0th labials entering the eye ; ven- 



trals 190 73. hyjwndas, p. 20 1. 



4th to 0th labials entering the eye; ven- 



trals 157 74. dendro/Jiiojts, 



[p. 264 



