4. HTiA. 375 



small groups between the choause. Snout short, rather truncate ; 

 canthus rostralis distinct ; loreal region nearly vertical ; tympanum 

 half the diameter of the eye. Pingers rather slender, webbed at 

 the base; toes two-thirds webbed; disks smaller than the tym- 

 panum ; subarticular tubercles moderate. The hind limb being 

 carried forwards along the body, the tarso-metatarsal articulation 

 marks the tip of the snout. Skin smooth above, granulate beneath ; 

 a fold above the tympanum, and another across the chest. Uniform 

 chestnut-brown above, whitish beneath. From snout to vent 

 42 millim. 

 America ? 



49. Hyla zebra. 

 Hyla zebra, Dum, ^ Bibr. p. 575. 



Vomerine teeth on a level with the hinder edge of the ohoante. 

 Fingers one-third, toes four-fifths webbed. Head covered with 

 small granules. Flanks with large black spots ; thighs with broad 

 black bands alternating with narrower white ones. Otherwise as 

 in H. fusca. From snout to vent 64 millim. 



Buenos Ayres. 



50. Hyla pulchella. 



Hyla agrestis, Giinth. Cat. p. 105. 

 Hyla prasina, Giinth. I. c. 

 Hyla pulchella, Bum. Sf Bibr, p. 588; Sfeindachn. Abh. stool-bot. 



Ges. Wien, 1864, p. 211, pi. 9. f. 2. 

 ? Hyla leucomelas, Bum. Sf Bibr. p. 576. 

 Hyla agrestis, Bell, Zool. Beagle, Rept. p. 46, pi. 19. f. 3 ; Cunningh. 



Trans. Linn. Soc. xxxii. p. 408. 

 prasina, Burmeist. Erlduter. p. 106, pi. 31. f. 2 ; Oiebel, Zeitsckr. 



Ges. Naturwiss. xxix. p. 28. 



lateralis, Maddi, Mem. Soc. Ital. xix. p. 07. 



rubicimdula, Hensel, Arch.f. Naturg. 1867, p. 158. 



Tongue subcircular, entire, and free behind. Vomerine teeth in 

 two small groups on a level with the hinder edge of the choanse. 

 Head rather small, about as long as broad ; snout rounded, longer 

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

 region nearly vertical; interorbital space as broad as, or a little 

 broader than, the upper eyelid ; tympanum very distinct, about half 

 the diameter of the eye. Fingers slightly webbed ; no projecting 

 rudiment of poUex ; toes two-thirds or three-fourths Avebbed ; disks 

 smaller than the tympanum; subarticular tubercles moderate; a 

 distinct fold along the inner edge of the tarsus. The hind limb 

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

 tion reaches the tip of the snout, or nearly so. Skin smooth or 

 minutely granulate above, strongly granulate beneath ; a fold from 

 the eye to the shoulder, above the tympanum. The specimens at 

 my disposal show two varieties of coloration, which are perhaps 



