60. COLUBER. Di 
** Rostral broader than deep. 
+ No subocular below the preocular. 
+ Seales in 23 rows or more; third labial not 
entering the eye. 
Scales in 33 rows, smooth or faintly keeled ; 
ventrals 247-260; subcaudals 112 .... 10. chlorosoma, p. 38. 
Seales in 27 to 33 rows, faintly keeled ; 
ventrals 252-266; subcaudals 102-119. 11. flavirufus, p. 39. 
Seales in 25 to 31 rows, faintly keeled on 
the posterior part of the body; ventrals 
200-239; subcaudals 60-88.......... 12. guttatus, p. 39. 
Scales in 25 or 27 rows, all perfectly smooth ; 
ventrals 222-260; subcaudals 68-89 .. 13. leopardinus, p. 41. 
Scales in 28 or 25 rows; ventrals 201-228 ; 
Supcaieats GO—GOl i gegsiaes 6-60 os aes 14. hohenackeri, p. 42. 
tt Scales in 23 rows; third and fourth labiais 
entering the eye; ventrals 208-222; sub- 
caudals 62-74...... 15. mandarinus, p. 42. 
ttt Scales in 21 rows; ventrals 162-190; sub- 
caudals 47-68...... 16. rufodorsatus, p. 43. 
tT A subocular below the przocular; scales in 23 
OF 
to 27 rows; ventrals 172-214; subcaudals 50- 
SO ets cas dese ems 17. dione, p. 44. 
(. Scales feebly but distinctly keeled, in 23 or 25 rows. 
18 rontal considerably longer than broad. [p. 45. 
Ventrals 195-234; subeaudals 63-90 .... 18. quatuorlineatus, 
Ventrals 280-284; subeaudals 90-107 .. 19. teniurus, p. 47. 
** Frontal not or but slightly longer than broad. 
Seales in 23 rows; ventrals 208-221; sub- 
caudals 61-76; loreal considerably 
lgpser than deep: <...." a. esc ass 2 20. schrencku, p. 48: 
Scales in 25 rows (rarely 23 or 27); ventrals 
200-234; subeaudals 67-85 ........ 21. vulpinus, p. 49. 
3. Scales strongly keeled, in 27 rows. 40. lineaticollis, p. 64. 
B. Ventrals with a distinct, though often very obtuse, lateral keel. 
1. Anal usually divided ; scales in 21 rows or more. 
a. Subcaudals less than 125, 
a. No subocular below the preocular. 
* Scales in 25 to 29 rows. 
Scales smooth or very faintly keeled...... 22. letus, p. 49. 
Scales very distinctly keeled ............ 23. obsoletus, p. 50. 
