378 nvtiBJE. 



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

 articulation marks the front of the eye. Skin smooth above, granu- 

 late beneath. Purplish blue above, immaculate, the colour sharply 

 defined along the sides : upper lip white-margined ; beneath whitish, 

 immaculate. From snout to vent 32 millim. 

 Costa. Rica. 



a. J . Costa Rica. 



55. Hyla pulchrilineata. 

 Hyla pulchrilineata, Cope, Proc. Amor. Philos. Soc. xi. 1869, p. 163. 



Form that of H. arborea. Tongue slightly free behind. Vome- 

 rine teeth in a single transverse series opposite the posterior margin 

 of the choanoe ; the latter much larger than the ostia pharyngea. 

 Canthus rostralis distinct ; loreal region concave ; eye large, tym- 

 panum one fourth its size. Fingers free ; toes webbed to the base 

 of the penultimate phalange ; disks well developed. The hind limb 

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

 marks the front of the orbit. Skin smooth above ; granules of the 

 abdomen unusually w T eakly developed. Pale ashy brown above, 

 with five longitudinal citron-yellow bands, the outer broadest ; 

 femora finely yellow above and behind ; a yellow longitudinal line 

 on both the inner and outer sides of the tibia. From snout to vent 

 88 millim. 



San Domingo. 



56. Hyla andersonii. 



Hyla andersonii, Baird, Proc. Ac. Philad. vii. 1854, p. 61 ; Cope, eod. 

 loc. 1862, p. 154. 



In proportions and general appearance similar to II. arborea. 

 Tongue broad, slightly emarginate. Yomerinc teeth in two oblique 

 series between the choanal, each directed inward and backward. 

 Tympanum about one third the size of the eye. Skiu of upper sur- 

 faces smooth, minutely corrugated ; lower surfaces granulate ; a 

 fold across the chest. Above dull olive-brown ; the concealed 

 surfaces of limbs, especially those in contact with each other, thickly 

 sprinkled with circular yellowish-white spots on a pale brown 

 around, seen also on the armpits and sides of body behind ; a post- 

 ocular dark vitta extended down the sides, and sending a dark 

 branch across the arm to the chin ; no bars on the limbs. From 

 snout to vent about 2 inches. 



United States — New Jersey to South Carolina. 



57. Hyla exirnia. 



Hyla euphorbiacea, Giinth. CM. p. 100, pi. x. f. C. 



Hyla exirnia, Baird, Proc. Ac. Phi/ad. 1851, p. 61, and U.S. Me.v. 

 "Bound. Surv. p. 20, pi. 38. f. 8-10 ; Peters, Hon. Berl. Ac. 1860, 

 p. 880 ; Brocchi, Bull. Soc. Philom. (7) i. p. 128. 



— — euphorbiacea, Steindachn. Novara, Amph. p. 59. 



