190 COLTTBEID^. 



3. Eostral a little broader than deep ; a single anterior tem- 

 poral ; scales in 19 rows. 



Four lower labials in contact with the 



anterior chin-shields ; belly yellow .... 5. coronata, p. 196. 



Five lower labials in contact with the an- 

 terior chin-shields ; belly blackish .... 6. regularis, p. 196. 



B. Anal undivided. 



1. Upper portion of rostral broad ; normally seven upper labials. 



a. Scales in 19-25 rows ; ventrals 198-240, not angulate 

 laterally ; rostral once and a half as broad as deep. 



Eye moderate ; scales in 19-23 rows ; dark 



brown or black above, with yellow or 



white markings 7. getula, p. 197. 



Eye small ; scales in 21-25 rows 8. calligaster, p. 198. 



h. Scales in 21-23 rows ; ventrals 188-214 ; rostral twice 

 as broad as deep. 



Portion of rostral visible from above mea- 

 suring less than one fourth its distance 

 from the frontal 9. leonis, p. 199. 



Portion of rostral visible from above mea- 

 suring one third to one half its distance 

 from the frontal 10. triangulum, p. 200. 



c. Scales in 19-25 rows, usually 21 or 23 ; ventrals angu- 



late laterally ; rostral once and a half as broad as deep. 



Ventrals 179-210 ; first black band on 



nape only 11. gentilis, p. 201. 



Ventrals 198-224 ; body compressed ; first 



black band on nape only 12. zonata, p. 202. 



Ventrals 204-240 ; first black band form- 

 ing a complete ring, extending across the 

 throat 13. micropholis, p. 203. 



d. Scales in 17-19 rows ; ventrals 161-180. 



14. doliata, p. 205. 



2. Upper portion of rostral not broader than the anterior 

 nasal ; eight upper labials .... 15. hraehyura, p. 206. 



II. Usually two preeoculars ; anal divided ; scales in 15-17 rows. 



Scales in 15 rows ; ventrals 136-160 .... 16. punctata, p. 206. 

 Scales in 15 rows ; ventrals 182-222 .... 17. amabilis, p. 207. 

 Scales in 17 rows ; ventrals 183-237 .... 18. regalis, p. 208. 



