4. HTLA. 399 



98. Hyla pickeringii. 



Acris pickeringii, Giinth. Cat. p. 71. 

 Hylodes pickeringii, Holbr. N.-Amer. Herp. iv. p, 135, pi. 34. 

 Hyla pickeringii, Leconte, Proc. Ac. Philad. vii. 1864, p. 429. 



Tongue heart-shaped, free behind. Vomerine teeth in two small 

 groups just behind the level of the choanse. Head moderate, as 

 long as broad ; snout subacuminate, once and a half as long as the 

 diameter of the eye ; canthus rostralis distinct ; loreal region slightly 

 concave ; interorbital space broader than, the upper eyelid ; tym- 

 panum small, hardly visible. Fingers free ; no projecting rudiment 

 of poUex ; toes not quite half webbed ; disks and subarticular 

 tvibercles moderate. The hind limb being carried forwards along 

 the body, the tibio-tarsal articulation reaches the eye. Skin smooth 

 or minutely tuberculate above, granulate beneath. Greyish above, 

 dotted with darker, and with angular symmetrical lines ; a dark 

 streak from the tip of the snout through the eye to the middle of 

 the side ; tibise cross-barred ; beneath whitish, immaculate. Male 

 with an internal subgular vocal sac. From snout to vent 17 miUim. 



United States (Eastern Region). 



c. cj • N. America. 



99. Hyla curta. 



Hyla curta, Cope, Proc. Ac. Philad. 1866, p. 313. 



Tongue free behind. Vomerine teeth in two groups between the 

 choansB. Snout projecting ; canthus rostralis well defined, straight ; 

 loreal region not concave ; tympanum one third the diameter of the 

 eye. Fingers and toes stout, the former free, the latter half webbed ; 

 disks well defined. The hind limb being carried forwards along the 

 body, the tibio-tarsal articulation reaches the anterior margin of the 

 orbit. Skin smooth or sparsely and finely tuberculate above. Above 

 ashy brown, with a dark interocular triangle and a broad dorso- 

 lateral band on each side, often broken into elongate spots ; limbs 

 punctulate and cross-barred. Male without vocal sac. From snout 

 to vent 95 millim. 



Cape St. Lucas, Lower California. 



100. Hyla elaeochroa. 

 Hyla elseochroa. Cope, Journ. Ac. Philad. (n. s;) viii. p. 105, pi. 26. f. 3. 



Tongue longer than wide. Vomerine teeth between the choanse, 

 in two short series directed backwards towards the median line. 

 Snout elongate and plane above, and slightly projecting. Eye large, 

 four or five times the area of the membranum tympani. Fingers 

 entirely free ; toes two-thirds webbed ; disks large. The hind limb 

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

 reaches the tip of the snout. Colour above and below a uniform 



