4. HYLA. 379 



Closely allied to H. arhorea. The head is smaller, the fingers are 

 more slender, and the wch between them very indistinct ; the toes 

 are only one-third or half webbed. The hind limb being carried 

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

 X)anum or the posterior border of the eye. Olive above ; a brown, 

 light-edged streak from the iiostril through the eye and the tympa- 

 num, along the side of the body ; upper lip with a brown and light 

 margin; beneath whitish, immaculate. Male with an external 

 subgular vocal sac. From snout to vent 40 millim. 



Mexico. 



A. Back with elongate spots more or less cojifluent into longitu- 



dinal bands. {H. eximia.) 

 (I. 5 . City of Mexico. Mr. Doorman [C.]. 



B. Back uniform; hinder side of thighs brownish, white-spotted. 



{H. cupliorhiacea .) 



b-c. 2- Mexico. -M. SaUe[C.].) 



d. Skeleton. Mexico. M. Salle [0.]. / Types of H. 



e. J. Cordova. M. SaHe [C.jA eHphorbiacea. 

 /-(/. c?. Cordilleras. ) 



58. Hyla arhorea. 



Hyla arborea, Giinth. Cat. p. 107. 

 Rana arborea, Linn. S. N. i. p. 357 ; liosel, Hist. Ran. p. 32, pis. 9- 



12 ; Sturm, Dentschl. Faun, iii. Heft 1. 

 Hyla viridis, Law. Syn. Itept. p. 33; Baud. Rain. p. 14, pi. 1, and 



Rept. viii. p. 23 ; Gravenh. Belie, p. 23; Bonap. Faun. Ital.; Bum. 



tS' jBib): p. 581; Fatio, Vert. Suisse, iii. p. 423; Lessona, Atti Ac. 



Li7ic. 1., Hem. CI. Sc.-Jls. ^fc. 1877, p. 1090, pi. 3. 

 Calamita arboreus, Sehneid. Amph. p. 153; Merr. Tent. p. 170. 

 Hyla arborea, Cur. R. A. ; Be Betta, Faun. Ltal., Rett. Anf. p. 01 ; 



Schreib. Herp. Eur. p. 106 ; Leydig, An. Batr. p. 94. 

 Hyas arborea, Wayl. Syst. Amjyh. p. 201. 

 Dendroliyas arborea, Tschudi, Batr. p. 74. 



Tongue subcircular, slightly nicked, and free behind. Vomerine 

 teeth in two small transverse or slightly oblique groups between the 

 ciioana). Head moderate, broader than long ; snout rounded, as 

 long as the diameter of the orbit ; canthus rostralis distinct; loreal 

 region slightly oblique, slightly concave ; interorbital space as broad 

 as, or a littlo l)roader than, the upper eyelid ; tympar.um distinct, 

 about half the diameter of the eye. Fingers slightly webbed at the 

 base; no projecting rudiment of poUex ; toes two- thirds webbed; 

 disks a little 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 

 articulation reaches the eye or a little beyond. Skin smooth above, 

 granulate beneath. Greenish above, uniform whitish beneath. 

 Male with a large, brown, external gular vocal sac. From snout to 

 vent 51 millim. 



Europe ; temperate Asia ; North Africa. 



