394 HTLID^. 



84. Hyla nigripes. 



Hyla nigripes, Cope, Journ. Ac, Philad. (n. s.) viii. 1876, p. 104, pi. 23. 

 f. 7. 



Tongue subeirctilar, openly emarginate and slightly free beMnd. 

 Vomerine teeth in two short transverse series between the choanae. 

 Head moderate, as long as broad ; snont rounded, slightly longer 

 than the diameter of the orbit ; canthus rostralis distinct ; loreal 

 region oblique, slightly concave ; interorbital space slightly broader 

 than the upper eyelid ; tympanum distinct, nearly half the diameter 

 of the eye. Three outer fingers nearly half webbed ; no projecting 

 rudiment of poUex ; toes three-fourths webbed ; disks smaller than 

 the tympanum ; subarticular tubercles little developed. The hind 

 limb being carried forwards along the body, the tibio-tarsal articu- 

 lation reaches between the eye and the tip of the snout. Skin 

 smooth above, granulate beneath. Dark oUve-brown above ; sides 

 of body finely black- and white-marbled ; greyish beneath. From 

 snout to vent 30 miUim. 

 Costa Eica. 



a. 2 . Costa Rica. 



85. Hyla palliata. 



Hyla palliata, Cope, Proc. Ac. Philad. 1863, p. 47. 



Tongue oval, nicked. Vomerine teeth in a short uninterrupted 

 series behind the posterior margin of the choanse. Snout pro- 

 minent, truncate ; loreal region not concave ; the distance from the 

 nostril to the orbit equals the diameter of the latter, and is less than 

 the width of the interorbital space ; tympanum one sixth the size of 

 the eye. Three outer fingers one-third webbed ; a distinct rudiment 

 of pollex ; toes webbed to penultimate phalange. The hind limb 

 being carried forwards along the body, the tibio-tarsal articulation 

 marks the middle of the orbit. Skin smooth above, not granulated 

 in the gular region. Extremities, lower surfaces, loreal and labial 

 regions greyish brown; upper surface of head and body pale 

 ochreous, abruptly separated from the other colour all round. 

 Male with a vocal sac. From snout to vent 19 millim. 

 Paraguay. 



86. Hyla polyliaBnia. 



Hyla rubicundula, (non Beirih. ^ Liitk.) Giinth. Proc. Zool. Soc. 1868, 

 p. 489, pi. 40. f. 3. 



polytsenia, Cope, Proc. Amer. Philos. Soc. 1869, p. 164., 



striata, Peters, Mon. Bert Ac. 1872, p. 681. 



Tongue suboiroular, entire, scarcely free behind. Vomerine teeth 

 in two small groups behind the level of the choanse. Head mode- 

 rate, a little broader than long ; snout rounded, as long as the 

 diameter of the orbit ; canthus rostralis angular ; loreal region not 

 very oblique, concave ; interorbital space broader than the upper 

 eyelid J tympanum distinct, one third the diameter of the eye. 



