130 ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 



67. Epicrates cencheia, Linn., Dr. Van Patten. 



68. Boa impeeator, Daudin. 



Not an uncommon species from the east coast to the foot of the mountains. 



69. Leptognathus annulata, Giinther, Annals and Magaz. Nat. Hist. 1872. 

 Not seen by me. 



70. Leptognathus aegus, Cope, sp. nov. 



Body compressed; scales in fifteen rows, smooth, larger above than on the 



sides, the median row not abruptly larger than those adjoining it. Head wide, 



muzzle very short, orbit bounded in front by the loreal and prefontal scuta. Rostral 



plate triangular, as high as wide, very small; internasals small, prefontals large. 



Frontal and occipitals large, the former with parallel sides equal to the anterior 



border. Superior labials seven, orbit bounded by the fourth, fifth, and sixth. 



Inferior labials seven, the first, second, and third smaller than those that follow, 



the first pair not uniting behind the symphyseal. Geneial plates three pairs, the 



anterior two each longer than wide, the third quadrate, smaller. Postorbitals two, 



temporals 1—2. Gastrosteges 212; anal entire; urosteges 121. 



M. 



Total length 345 



Length of tail .......... .104 



" to rictus oris ......... .007 



Width of head behind ........ .007 



Color above from the third row of scales greenish-ash, with two series of alter- 

 nating light ocelli with black borders. Below, yellow to the third row of scales ; 

 the sides below that row with a series of black-edged ocelli like those of the back. 

 Below, blackish speckled on the posterior half of the length. A large black- 

 bordered ocellus on the nape. Head vermiculated with black ; lips yellow, with 

 black specks. 



This species belongs to the same group of the genus as the L. anthraeops, Cope. 

 From Sipurio. 



71. Leptognathus pictiventris, Cope, sp. nov. 



Belonging to the same group of the genus as the L. argus, i. e. with the verte- 

 bral series of scales not enlarged; scales smooth, and a pair of elongate colubriform 

 geneial shields. It differs in the peculiarity that the front of the long geneials is 

 in immediate contact with the wedge-shaped symphyseal. Scales in fifteen series, 

 the lateral smaller. The muzzle is not so short as in the L. argus, but more as in 

 L. nebulata. Internasals transverse triangles; frontal wide, occipitals long. Nasal 

 undivided; orbit bounded by the prefontal above, the loreal medially and a pre- 

 ocular below. Postoculars two, the inferior separating the seventh labials from the 



