108 COLtrBEID-S!. 



the praefrontals ; frontal once and one third as long as broad, as 

 long as its distance from the rostral, shorter than the parietals ; 

 nasal elongate, divided; loreal present, once and a half as long as 

 deep ; one praeocular, not reaching the frontal ; two postoculars ; 

 temporals 1 + 2 ; eight upper labials, fourth and fifth entering the 

 eye ; five lower labials in contact with the anterior chin-shields, 

 which are shorter than the posterior. Scales in 15 rows, all except 

 the outer strongly keeled ; caudal scales smooth, except the basal 

 ones. Ventrals without trace of lateral keel, 171 ; anal divided ; 

 subcaudals 171. Uniform olive-green above, pale green beneath ; 

 lips and throat yellowish ; a blackish streak on each side of the 

 head, behind the eye. 



Total length 1300 millim. ; tail 540. 



Guatemala. 



a. c? (V. 171 : 0. 171). Eio Chisoy, below the 0. Salvin, Esq. [P.]. 

 town ofOubulco. (Type.) 



4. LeptopMs mexicanus. 



LeptopHs mexicanus, Bum. %■ Bibr. vii. p. 536 (1854) ; Jan, Icon. 



Om. 49, pi. vi. fig. 3 (1879). 

 AhEetuUa mexicana, Guntli. Cat. p. 154 (1858). 

 Thrasopa mexicanus. Cope, Froc. Ac. Philad. 1860, p. 557. 

 Hapsidophrys mexicanus, Cope, Proc. Am. Philos. Soc. xxii. 1885, 



p. 382. 



Rostral broader than deep, just visible from above ; internasals 

 as long as or a little shorter than the prsefrontals ; frontal once and 

 one third to once aud two thirds as long as broad, as long as its 

 distance from the end of the snout, a little shorter than the 

 parietals ; nasal elongate, divided ; loreal present, twice to thrice as 

 long as deep ; one praeocular, not reaching the frontal ; two post- 

 oculars ; temporals l-|-2; eight upper labials, fourth and fifth 

 entering the eye ; four or five (rarely six) lower labials in contact 

 with the anterior chin-shields, which are shorter than the posterior. 

 Scales in 15 rows, striated, all except the outer row strongly keeled ; 

 caudal scales keeled. Ventrals feebly angulate laterally, 154-174 ; 

 anal divided ; subcaudals 141-172. 



Total length 1340 millim. ; tail 520. 



Northern Mexico to Costa Eioa. 



A. Pale bronzy brown or golden above, head blue or green ; a 

 black lateral stripe on the head and body, passing through 

 the eye, enclosing some bluish-green spots in the anterior half 

 of the body; upper lip and lower parts mother-of-pearl or 

 pale golden. 



a. Hgr. (V. 166 ; C. 162). Amula, Guerrero. Mr. H. H. Smith [C] ; 



F. D. Godman, Esq. 



[P.]. 

 5. Hgr. (V. 164; 0.156). Teapa, Tabasco. F. D. Godman, Esq. 



