** Outer row of scales keeled; 4th and 6th labials 
entering the eye........ 60. nigrocinctus, p. 255. 
f. Two anterior temporals. 
* Eye moderate or large. 
+ Frontal shorter than parietals. 
+ Internasals shorter than prefrontals; outer row 
of scales smooth or feebly keeled. 
3rd to 5th labials entering the eye ...... 61. subminiatus, p. 256, 
4th to 6th labials entering the eye ...... 62. spilogaster, p. 257. 
tt Internasals ‘as long’ as preefroutals; outer row 
of scales keeled .... 63. chrysargus, p. 258. 
tt Frontal as long as parietals. 
64. monticola, p. 259. 
_ ** Eye very large; subcaudals 95- 113. 
65. maculatus, p. 260. 
4, Scales in 21 rows .........+.4.- 66. chrysargoides, 
[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 that prefrontals .. 67. saravacensis, p, 261. 
Internasals longer than preefrontals ...... 68. auriculatus, p. 261. 
2. Scales in 19 rows, all strongly keeled. [p. 262, 
Bubcaudale 96-101 wu. 5 ss Seats ease es 69. crebripunctatus, 
Subcaudals 66............ Cousens ... 70. lineatus, p. 262. 
P) 3. Scales in 19 or 21 rows, outer row smooth or feebly keeled. 
Scales in 19 rows; two labials entering 
the Cy .. 0... eee reece en onneee 71. flavifrons, p. 263, 
Scales in 21 rows; three labials entering | . 
TIE SYO 5... . 2: sas eRe Suh ES 72. callistus, p. 263. 
IV. Maxillary teeth 35-40, posterior but slightly enlarged ; eye 
very large ; body very slender, (MacroroPuis.) 
5th and 6th labials entering the eye; ven- 
trals 196 ..:4 /diswse bs's'=560,8 Shane Oe . 78, hypomelas, p. 264, 
4th to 6th labials entering me eye; ven- 
trale 167 {spi ie 5s 0555545555 «74. dendrophiops, 
[p. 264 
