128 OPHIDIA., 
the anterior part of the body. But in all specimens the ground-colour of the sides 
encroaches largely upon the ventral shields. One female specimen from Vera Paz is 
nearly black, with the head and tail of a lighter (in life probably red) colour. 
An adult male is 49 inches long, of which the tail measures 163. An adult female 
measures 53 inches, the tail being 20. 
Herpetodryas brunneus, from Guayaquil, is closely allied to D. dendrophis, but 
distinguished by a smaller eye. This character would be less conspicuous in young 
specimens. 
HERPETODRYAS. 
Herpetodryas, Boie, Isis, 1827. 
1, Herpetodryas fuscus. 
Coluber fuscus, Linn, Mus. Ad. Fried. p. 82, t. 17. fig. 1. 
Herpetodryas fuscus, Dum. & Bibr. Erpét. vii. p. 209; Cope, Bull. U.S. Nat. Mus. no. 382, p. 70. 
Herpetodryas carinatus, var., Schleg. Ess. 11. p. 175, t. 7. figg. 3, 4. 
Hab. Panama, Darien (Cope).—Tropicat SoutH AMERICA, east of the Andes. 
2. Herpetodryas carinatus. 
Coluber carinatus, Linn. Syst. Nat. i. 1, p. 384. 
Herpetodryas carinatus (part.), Schleg. Ess. ui. p. 175, t. 7. figg. 5, 6. 
Herpetodryas carinatus, Dum. & Bibr, Erpét. vii. p. 207; Cope, Journ. Ac. N. Sc. Phil. viii. 
p. 135 (1875). 
Hab. Costa Rica (Gabb), San José (Van Patten); Panama, Chiriqui (Champion), 
Darien (Cope).—TropicaL SoutH AMERICA, east of the Andes. 
The carination of the median dorsal scales of the specimen from Chiriqui is so faint 
that the specimen might be referred to H. fuscus. 
3. Herpetodryas grandisquamis. 
Spilotes grandisquamis, Peters, MB. Ak. Wiss. Berl. 1868, p. 451. 
Herpetodryas grandisquamis, Cope, Journ. Ac. N. Sc. Phil. viii. p. 185 (1875). 
Hab. Costa Rica. 
4. Herpetodryas melas. 
Herpetodryas melas, Cope, Proc. Am. Phil. Soc. xxiii. p. 278 (1886). 
Hab. Nicaracua. 
