POLYPEDATES QUADRILINEATUS. 429 



those of the toes. Fingers slightly, toes broadly, webbed, the interdigital membrane extend- 

 ing to the disks of the third and fifth fingers. 



The coloration varies ; the most constant markings are brownish cross bars on the limbs, 

 small, more or less distinct, round white or whitish spots on the hinder side of the thigh, and 

 a more or less developed white streak on the upper lip. This species has the power of 

 changing its colours ; it is sometimes buff above, sometimes ashy-grey, chocolate-brown, 

 tinged with rose or lilac, black spots being more or less \isible. In specimens preserved in 

 spirits we observe the following variations : — 



a.. A more or less distinct cross band between the eyes ; back with brown spots, but with- 

 out an houi-glass-shaped marking; a brown band runs along the canthus rostralis and is 

 continued to behind the orbit and over the tympanum : Ceylon, Madras, Sikkim, Tenasserim. 

 Gamboja. 



/3. A very distinct hourglass-shaped marking on the back, with or without a cross bar 

 between the eyes ; vent variegated with black and white ; limbs with, more or less distinct 

 dark cross bars. Young specimens with a very distinct white streak along the upper lip ; it 

 is gradually lost ^vith age : Ceylon. 



y. The hourglass-shaped marking is present, but its outlines are more or less irregular and 

 undulated : China, Siam. 



S. Upper parts of a nearly uniform coloration. 



This species is one of the most common frogs of Ceylon and of the continent of India. In 

 the Himalayas (Sikkim) it ascends only to an altitude of 2780 feet ; and, singularly, in Pinang 

 it is absent in the valleys, whilst it occurs at an altitude of above 2000 feet. Females are 

 much larger and much more numerous than males, the former attaining to a length of 

 3^ inches, and the latter to that of 2|-, the hind limbs being respectively 5f and .3^ inches 

 long. I have not found any vocal sacs in the male. 



POLYPEDATES QUADRILINEATUS. 



Hyla quadrilineata, Wiegni. Act. Acad. Cces. Leap. -Carol. 1835, p. 260. tab. 22. fig. 1. 

 Poh'peclates rugosus, part., Dum. ^- Bibr. viii. p. 520. 

 quadrilineatus, Gtinth. Batrach. Sal. p. 79. 



This species is very closely allied to P. maculatus, from which it difi"ers only in the following 

 points. It is brownish olive above, with four dark, black-edged longitudinal bands, two of 

 which commence at the nose, the others in the superciliary region ; sometimes the dark band 

 crossing the tympanum is continued along the side of the body ; limbs with cross bars of the 

 same colour as the bands. Lower parts whitish. The vomerine teeth are always in two 

 distinctly oblique, convergent series, which commence at a short distance from the antei-ior 

 angle of the choanse. The occiput is never elevated into transverse ridges. 



This tree-frog belongs to the fauna of the Archipelago (Java, Philippine Islands), but it 

 occurs also at Pinang and Singapore, as is the case with so many Archipelagic forms. Our 

 largest individual is 3 inches long, the length of the hind limb being 5 inches. 



