HYLA. 435 



RHACOPHORUS, Kuhl. 



Slender in habit; skin smooth. Finjg^ers and toes entirely webbed, with 

 the terminal disks very large. Vomerine teeth in two series, separated by 

 an interval, and sitnated on a level with the anterior angle of the choanae. 

 Tongue large, elongate, free and deeply notched behind. Tympanum dis- 

 tinct ; openings of the eustachian tubes rather small. Males with a simple 

 internal subgular sac. 



Three species are known : one, Eh. reinwardtii, is found in the eastern parts of the Archi- 

 pelago, the second, Bh. jmrdalis, in the western, whilst the third inhabits Northern India. 



Rhacophoeus maximus. 



? Rhacophorus reinwardtii, Diun. &; Bibr. Atlas, pi. 89. figs. 1 & 1 o (not Boie). 

 Rhacophorus maximus, Gunth. Batrach. Sal. p. 83. 



Uniform dark violet above (green during life ■?), brownish below. Interdigital membranes 

 not spotted. Vomerine teeth in two transverse slightly curved series, with a large interspace 

 between them. Tympanum half the size of the eye. 



We have received several examples of this frog from Nepal and from Sikkim, where it 

 extends to an altitude of 5200 feet. Another specimen is marked as coming from Afghanistan. 

 It is one of the largest Indian Tree-frogs, its body being 3f inches long, and the length of 

 its hind limb 6 inches. 



HYLA, Bum. 4- Bibr. 



Skin smooth, or with small tubercles ; no large gland. Fingers and toes 

 with the terminal disks well developed ; toes webbed, fingers frequently 

 connected by a more or less developed membrane. Tympanum distinct. 

 Tongue large, subclrcular, entire, or only slightly notched behind. Vomerine 

 teeth present. Male with one or two vocal sacs. 



The species of this genus are extremely numerous and spread over the greater part of the 

 temperate and tropical regions; they appear to be absent in Tropical Africa and India. 

 However, a form closely resembling the European Tree-frog is found in the north-eastern 

 part of the latter region. 



S K 2 



