42. Hyla gabbii. 



Hyla gabbii, Cope, Juuni. Ac. Fhilad. (ii. s.) viii. 1876, p. 103. 



Allied to H.haudinii; differing in the followicg points : — Tym- 

 panum less than half the area of the orbit. Fingers half webbed, 

 the disks about equal to the tympanum. Colour ashy brown, the 

 pigment forming a narrow band on the upper face of the femur ; 

 anterior and posterior faces of femur dusky, uniform ; some 

 large irregular brown spots on the back ; groin marbled with 

 light brown and white ; lip with a faint pale border, no large 

 spots on it or the lores : tibia and forearm with broad pale- 

 brown cross bands ; lower surfaces all whitish. From snout to 

 vent 5Q millim. 



Costa Rica. 



43. Hyla salvini. 



Tongue subcircular, entire, and slightly free behind. Vomerine 

 teeth in two short transverse series between the choanoe. Head 

 moderate, as long as broad ; snout rounded, longer than the dia- 

 meter of the orbit; eanthns rostralis distinct; loreal region oblique, 

 slightly concave ; interorbital space slightly broader than the upper 

 eyelid ; tj-mpanum distinct, half the diameter of the eye. Three 

 outer fingers three-fourths webbed ; no projecting rudiment of 

 poUex ; toes entirely webbed ; disks nearly as large as the tym- 

 panum ; subarticular tubercles not much developed ; a distinct fold 

 along the inner edge of the tarsus. The hind limb being carried 

 forwards along the body, the tibio-tarsal articulation marks the tip 

 of the snout. 8kin smooth above, or with scattered very small 

 tubercles ; a slight denticulation along the outer side of the fore- 

 arm ; beneath granulate. Uniform brown above ; hind limbs with 

 indistinct darker cross bands ; sides of body and of thighs with 

 brown reticulation ; beneath whitish, immaculate. From snout to 

 vent 55 millim. 



Costa llica. 



a. 5 . Cai'tago. 



h. 5 . Costa Eica. 0. Salvin, Esq, [C.]. 



44. Hyla versicolor. 



Hyla versicoliir, Gunth. Cat. p. 103. 

 ? Hjda verrucosa, Daud. Rain. p. 33, pi. 4. f. 1. 

 Hyla versicolor, Leconte, Ann. Lye. N. H. Nciv York, i. p. 281 ; 



Harlan, Jotirn. Ac. Philad. v. p. 343 ; Holbr. N.-Amer. Hcrp. i. 



p. 101, pi. 17; jDmw, 8f Bihr. p.oGG; Dekay, Nexo York Fatm., 



