\ 
1877.] 85 [Cope. 
Tenth Contribution to the Herpetology of Tropical America. 
By E. D. Cops. 
(Read before the American Philosophical Society, July 20, 1877.) 
The greater number of the species described in this paper were sent to 
the Smithsonian Institution by its correspondents, and submitted to my 
examination by its Secretary, Professor Henry. 
Buro MELANOCHLORUS Cope. 
B. valliceps var, Cope, Journ. Academy, Phila., 1865, p. 100. 
Orbital borders elevated, and with parietal branch crests, which are 
prolonged ; toes long, nearly free ; end of carpus reaching end of muzzle ; 
paratoids large ; a lateral dormal fold ; tympanum large ; green with deep 
black spots ; throat and thorax black. 
This toad differs very much in appearance from the Bufo valliceps, but is 
nearly allied in essentials, its other affinities are to the B. auritus. The 
fingers are quite long, but the posterior legs are short, the heel reaching 
the posterior border of the orbit. The parietal crest is long; the supra- 
tympanic is well developed, and preorbital very weak. The front is not 
narrower, nor does the muzzle project beyond the mouth. The diameter 
of the very distinct round tympanic disc is half that of the orbit, which is 
large. The tongue is long and narrow, and the ostia are only half as large 
as the rather large choane. The parotoids are quite small, sub-triangular 
and directed outwards and backwards. The skin is nearly smooth above, 
except on the scapular and iliac regions, and is minutely roughened below. 
There are two tarsal tubercles, and no tarsal fold. Length of head and 
body, .047; of head, .015 ; of hind leg, .070; of hind foot, .030. 
The allied Bufo coniferus Cope differs from this species in its broadly 
palmate feet, etc. 
East Costa Rica, W. M. Gabb. 
Buro CANALIFERUS Cope. 
Orbital border reverted crest-like ; a preorbital crest ; tympanum dis- 
tinct ; head narrow, muzzle projecting ; parotoids large, triangular, with 
scapular-angle ; rough ; brown with dorsal and lateral light bands. 
This handsome species is characterized by the narrow gutter-like front, 
and prominent muzzle, together with the very large, angulate parotoids. 
The orbital borders are strongly everted, but without parietal branches. 
The preorbital crest is not very strong, and the supratympanic is quite 
short. The muzzle is contracted, and overhangs the mouth. The diameter 
of the distinct membranum tympani, is half that of the orbit. The parotoid 
reaches to above the middle of the humerus, has a straight external, and 
convex internal outline, and is rather lateral in position. Its lateral trun- 
cation is similar to that seen in B. hematiticus. The skin is tubercular 
everywhere, finely so below. The posterior limbs are of median length, 
I] 
