112 COLUBEID^. 



Eostral broader than deep, just visible from above ; internasals 

 shorter than the praefrontals ; 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 ; praefrontal in contact with 

 the second and third, or second, third, and fourth labials ; one 

 prseocular, 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 miUim. ; 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. c? (V. 152; C. ?). W.Ecuador. Mr. Fraser [C.]. (Type.) 



b-d. Hot. S (V. 178 : Cartagena. Capt. Garth [P.]. 



C. 147) & yg. (V. 174, 



1G7 ; C. ?, 159). 

 e. $ (V. 173; C. 155). Brazil? 



/. 2 (V. 185 ; C. 170). British Honduras. F. D. Godman, Esq. [P.]. 

 g. cS (V. 172 ; C. 169). Stann Creek, British Rev. J. Robertson [C.]. 



Honduras. 

 h. 5 (V. 182; C. 172). Tabasco. F. D. Godman, Esq. [PJ. 



i. rf (V. 180; C.?). Am ula, Guerrero. Mr. H. H. Smith [C.J; 



F.D.Godman,Esq.[P.]. 



B. Black above and beneath, chin and throat white. 



a. T\sr. 2 (V. 165 ; C. Guayaquil. (Type.) 

 133). 



b. Hgr. 2 (T. 163 ; C. ? Royal College of Sur- 



140). geons. 



10. LeptopMs nigromarginatus. (Plate III. fig. 3.) 



Ahsetulla nigromarginata, Giinth. Ann. df Mag. N. H. (3) xviii. 



1866, p. 28. 

 Leptophis marginatus, Cope, Journ. Ac. Philad. (2) viii. 1876, 



p. 177. 



Rostral broader than deep, just visible from above ; internasals 

 as long as or a little shorter than the prsEfrontals ; 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 ; 



