I 4. HTLA. 379 



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

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

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

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

 panum or the posterior border of the eye. Olive above; a brown, 

 light-edged streak from the nostril 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 confluent into longitu- 



dinal bands, (if. eximia.) 

 a. 5 • City of Mexico. Mr. Doorman [C.]. 



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



(H. euphorbiacea.) 



58. Hyla arborea. 



Hyla arborea, Cfilnth. Cat. p. 107. 

 Rana arborea, Idnn. 8. i\1 i. p. 857 ; Basel, Hist. Ran. p. 32, pis. 9- 



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

 Hyla viridis, Law. Syn. Sept. p. 33 ; Daud. Ham. p. 14, pi. 1, and 



Sept. ■viii.Tp, 23; Oravenh. Belie. ■^.28; Bonap. Faun. Ital.; JOum. 



Sr Sibr. p. 581 ; Fatio, Vert. Suisse, iii. p. 423 ; Leasona, Atti Ac. 



Line, i., Mem. a. Sc.-fis. ^c. 1877, p. 1090, pi. 3. 

 Calamita arboreus, Schneid. AmpTi. p. 153 ; Merr. Tent. p. 170. 

 Hyla arborea, Cuv. S. A. ; Be Betta, Faun. Ital., Sett. Anf. p. 61 ; 



Schreib. Serp. Fur. p. 106 ; Let/dig, An. Batr. p. 94. 

 Hyas arborea^ Wagl. Syst. AmpJi. p. 201." 

 Dendrohyas arborea, Tschudi, Batr. p. 74. 



Tongue subcircular, slightly nicked, and free behind. . Vomerine 

 teeth in two small transverse or slightly oblique groups between the 

 choanffi. 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 little broader than, the upper eyelid ; tympanum 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. 



