HTLA ARBOREA. 357 
HYLIDiE. 
HYLA. 
Hyla, Laurenti, Syn. Rept. 1768, p. 32, part. ; Blgr. Cat. Batr. Sal. B. M. 188.2, p. 337 ; Fauna 
of Brit. Ind., Rept. & Batr. 1890, p. 509. 
" Pupil horizontal. Tongue entire or slightly nicked, adherent or more or less free 
behind. Vomerine teeth. Tympanum distinct or hidden. Fingers free or more or less 
webbed ; toes webbed, the tips dilated into smaller or larger disks. Outer metatarsals 
united or slightly separated. Omosternum cartilaginous ; sternum a cartilaginous 
plate. Diapophyses of sacral vertebra more or less dilated." — Blgr. 
Hyla arboeea, linn. 
Ratia arborea, Linn. Syst. Nat. i. 1766, p. 357. 
Var. savignyi, Blgr. 
Hyla savignyi, Aud. Descr. de l'figypte, Hist. Nat. i. ? 1829, p. 183, Suppl. Rept. pi. ii. (1812) 
figs. 13 i & 13 2. 
Rana arborea, Seetzen, Reise Syrien, Palast., Aegypt. &c. iii. 1855, p. 486. 
Hyla arborea, Anderson, Proc. Zool. Soc. 1872, p. 403 ; Herpet. Arabia & Egypt, 1896, p. 114. 
Hyla arborea, var. meridionalis, part., Boettger, Ber. Senck. nat. Ges. 1879-80, p. 212. 
Hyla arborea, var. savignyi, Blgr. Cat. Batr. Sal. B. M. 1882, p. 380; Caraerano, Boll. Mus. 
Torino, viii. 1893, no. 162, p. 4. 
This variety of the common tree-frog of Europe, described by Audouin, is characterized 
by him as follows : — This species much resembles in its general form, in the apple- 
green colour of the whole of the upper surface of the body, and in the granular 
structure of the integument of the abdomen and under surface of the limbs, the 
common tree-frog, but differs from it in the disposition of the yellowish bands that 
one observes on its sides. As in the green tree-frog, a black line extends from the 
nostril to the eye, passes over the tympanum, and is prolonged more or less on to the 
flanks ; two other yellowish lines start, likewise, from the posterior angle of the eye ; 
the lower of the two, instead of running along the inferior border of the black line of 
the flanks, passes a little downwards and borders the posterior aspect of the anterior 
limb to its extremity ; the upper of the two yellow bands runs along the upper surface 
of the black line, but forms no sinuous angle upon the loins, but extends along the 
whole length of the external border of the hind limb. The under surface of the body 
is yellowish white. 
Mr. Boulenger gives the following as the distinctive characters of this variety : — 
