214 COLUBRID. 
tt Eye about half as long as the snout; ventrals: 
147-175; subcaudals 55-65. . 
Nostril much nearer the internasal than 
ES ere 12. miniatum, p. 222. 
Nostril not nearer the internasal than 
the first labial 2... .6j.2. ovenssens 13. virgatum, p. 223. 
b. A single pair of chin-shields.. 14. rujficeps, p, 223. 
Bs Veetrale 210. 5.2 sa sis esis 11. canula, p. 222. 
B. Frontal pentagonal, or very slightly angulate in front. 
Anterior chin-shields shorter than the 
posterior and separated from the 
symphysial . . ...1): ih Few o's 15. bocourti, p. 224. 
Anterior chin-shields longer than the 
posterior and in contact with the 
GYM YOIAL 5 oe esis hin wins oman: h.n > 9. 6 16. reticulatum, p. 224. 
II. Frontal more than twice as broad as the posterior border of the 
supraocular. 
A. Rostral small, scarcely visible from above; seven upper 
labials ; two postoculars ...... 17. mestum, p. 225, 
B. Rostral large, well visible from above. 
"1. Seven upper labials. ° 
Q@. Anal enti. «is asses os 18. vermiforme, p. 225. 
b, Anal divided. 
Frontal scarcely longer than broad ; upper 
portion of rostral about half as long as 
its distance from the frontal ........ 19. breve, p. 225. 
Frontal considerably longer than broad ; 
upper portion of rostral about half as 
long as its distance from the frontal.. 20. atriceps, p. 226. 
Upper portion of rostral about two thirds 
as long as its distance from the 
| Ger PEE pee 21. planiceps, p. 226. 
2. Six upper labials ; one postocular. 
Upper portion of rostral much shorter [p. 227, 
than its distance from the frontal.... 22. calamarinum, 
Upper portion of rostral nearly as long 
as its distance from the frontal...... 23. gracile, p. 228, 
