Te COLUBRID ®. 
Rostral broader than deep, just visible from above ; internasals 
shorter than the prefrontals ; frontal once and one fourth to once 
and a half as long as broad, as long as its distance from the rostral 
or the end of the snout, as long as or a little shorter than the parie- 
tals ; nasal elongate, divided; no loreal; preefrontal in contact with 
the second and third, or second, third, and fourth labials; one 
preocular, in contact with or not quite reaching the frontal; two 
or three postoculars ; temporals 1+2; eight or nine upper labials, 
fourth and fifth or fifth and sixth entering the eye: four or five 
lower labials in contact with the anterior chin-shields, which are 
much shorter than the posterior, Scales in 15 rows, all” except 
the outer row more or less distinctly keeled; scales of middle row 
_more feebly keeled than the one or two on each side of it; scales 
on the neck and tail smooth. Ventrals 152-185, feebly angulate 
laterally ; anal divided; subcaudals 133-176. 
Total length 2000 millim. ; tail 730. 
Central America, Colombia, Ecuador, Peru. 
A. Green above, the keels brown or black; yellowish or pale green 
beneath; a black streak on each side of the head behind the 
eye, disappearing in old specimens. 
a.\g6 (V.152; C.?). |W. Ecuador. Mr. Fraser [C.]. (Type.) 
b-d. Her. ¢ (V.178: Cartagena. Capt. Garth [P.]. 
C. 147) & yg. (V.174, 
NGZs CoP. 159). 
Eo (V. 173; C. 155). Brazil ? 
yore (Vv. 185; C.170). British Honduras. F. D. Godman, Esqz [P.]. 
g. 3 (V.172; C.169). StannCreek, British Rev. J. Robertson [C.]. 
Honduras. 
h. 2 (V. 182; C.172). Tabasco. F. D. Godman, Esq. [P.]. 
mon ¥= 180;"C, ?P). Amula, Guerrero. Mr. H. H. Smith POsts 
F. D.Godman,Esq.[P.]. 
B. Black above and beneath, chin and throat white. 
a. Her. 2 (V. 165; C. Guayaquil. (Type.) 
133). 
b. Her. 2 (V. 163; C. ——P Royal College of Sur- 
140), geons. 
10. Leptophis nigromarginatus. (Prare III. fig. 3.) 
Aheetulla nigromarginata, Giinth. Ann. § Mag. N. H. (8) xviii. 
1866, p. 28. 
Leptophis marginatus, Cope, Journ. Ac. Philad, (2) viii. 1876, 
De lii. 
Rostral broader than deep, just visible from above; internasals 
as long as or a little shorter than the prefrontals; frontal once and 
a half to once and three fourths as long as broad, as long as its 
distance from the end of the snout, as long as or slightly shorter 
than the parietals; nasal elongate, entire or divided; no loreal ; 
. 
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