100 COLUBRID. 
2. Preocular separated from the frontal. 
a. Ventrals 172-206; subcaudals 51-85. 
a. Eye rather small, not half the length of the snout. 
Black cross-bars disposed in threes ; head 
PPAOK GDOWO Sh o'h cscs sree see se a 5. melanogenys, p. 105.. 
Black cross-bars or annuli not disposed 
in threes; head black above........ 6. doliatus, p. 106. 
Complete black annuli round the body ; 
head uniform yellow or orange...... 7. formosus, p. 106. 
B. Eye moderate, about half the length of the snout, 
Loreal present, at least twice as long as 
1 METERS RE ee 8. labialis, p. 107. 
pene i often absent; if present, short .. 9. clathratus, p. 107. 
b. Ventrals 232-236 ; subsdaticls 77-81. 
10. fitzingeri, p. 108. 
B. Normally seven upper labials; preocular not or but just 
reaching the upper surface of the head. 
1. Portion of rostral visible from above measuring one fourth 
to one third its distance from the frontal. 
Frontal a little longer than broad; sub- 
caudals 64-93 .........esereeees 11. clelia, p. 108. 
Frontal as long as broad; subcaudals 51. 12. maculatus, p. 110. 
2. Portion of rostral visible from above measuring about half 
its distance from the frontal. 
Preocular moderate, just reaching the 
upper surface of the head; subcaudals 
BI MOD Soon sine 0n's 69 06 ee Bee ey .-. 13, occipitoluteus, p. 110. 
Preocular very small; subcaudals 44-61. 14. rusticus, p. 111. 
II. Subcaudals single. 
A. Scales in 17 rows; rostral broader than deep, forming an 
obtuse angle posteriorly, its upper portion not more than 
half as long as its distance from the frontal; seven upper 
MOE FR re cb eu ce rie ete) 6 15. coronatus, p. 111, 
B. Scales in 19 rows; normally eight upper labials. 
Rostral much broader than deep, forming 
an obtuse angle posteriorly, its upper 
portion not more than half as long as 
its distance from the frontal........ 16. neuwiedti, p. 112, 
Rostral nearly as deep as broad, forming 
a right or acute angle posteriorly, its 
upper portion at least two thirds its 
distance from the frontal .......... 17. querini, p. 118, 
