4. HYLA. 373 



Bept. p. 71, pi. 21. f. 5.3 a ; Leconte, Proc. Ac, Philad. 1855, p. 428; 

 Wiecl, Nov. Act. xxxii. p. 110. 

 Dendi'ohyas versicolor, Tsckucli, Batr. p. 75. 



Tongue circular, slightly nicked, and free behind. Vomerine teeth 

 in two straight or slightly oblique groups on a level with the hinder 

 edge of the choansB. Head broader than long ; snout rounded, as 

 long as, or slightly longer than, the diameter of the orbit ; canthus 

 rostralis distinct ; loreal region slightly concave ; iutcrorbital space 

 as broad as, or a little broader than, the upper eyelid ; tympanum 

 very distinct, about two thirds the diameter of the eye. Fingers 

 one-third, toes three-fourths webbed; disks smaller than the tym- 

 panum ; subarticular tubercles moderate ; a very distinct fold along 

 the inner side of the tarsus. The hind limb being carried forwards 

 along the body, the tibio-tarsal articulation marks the tympanum 

 or the posterior corner of the eye. Upper surfaces with small 

 smooth warts, lower surfaces granulate ; a strong fold across the 

 chest. Greyish or olive above, with irregular darker markings and 

 dark cross bars on the limbs ; sides of thighs yellow, with a black 

 network ; beneath immaculate. Male with a large, dark- coloured, 

 external subgular vocal sac. From snout to vent 53 millim. 



Eastern i!^orth America. 



Canada. J. Howell, Esq. [P.], 



Chippaway. 



New York. 



Philadelphia. 



N. America. Dr. J. Green [P.J, 



(Mexico ?) 



45. Hyla arenicolor. 



Hyla afEnis, (non Spix) Baird, Proc. Ac. Philad. vii. 1854, and U.S. 



Me.v. Bound. Surv., Rcpt. p. 29, pi. 38. f. 4-7. 

 arenicolor, Cope, Journ. Ac. Philad. (2) vi. 18G0, p. 84. 



Tympanum two thirds the size of the eye. Fingers one-third 

 webbed. Tibia reaching more than halfway from vent to centre of 

 eye. Body rough. Colour ash-grey or green, with numerous 

 rounded dorsal blotches ; three transverse bands on each thigh and 

 leg ; no vermiculation on anterior and posterior faces of hind legs 

 nor on lower part of sides : a light spot under the eye. From snout 

 to vent 45 millim. 



Northern Sonora. 



46. Hyla cadaverina. 



Hyla nebalosa, {non Spix) Hallow. U.S. JR. R. Surv. x., Williamsons 



Pep., Rept. p. 21, pi. 10. f. 2. 

 cadaverLaa, Cope, Journ. Ac, Philad. (2) vi. 18G0, p. 84. 



Tongue subcircular, openly emarginate, and free behind. Vo- 

 merine teeth in two oblique groups between the choance. General 



