Oil new Tree-Frogs from Dutch New Guinea. 55 



VII. — Descriptions of Three new Tree-Frogs discovered hj/ 

 Mr. A. E. Pratt in Dutch New Guinea. Bj G. A. 

 BOULENGER, F.R.S. 



(Published by permission of the Trustees of the British Museuiu.) 



Hyla pratti. 



Tongue subcircular, slightly nicked; vomerine teeth in 

 two small groups between the choanre. Head as broad as 

 long ; snout rounded, scarcely prominent, hardly as long as 

 orbit; canthus rostralis distinct ; loreal region oblique, con- 

 cave; nostril equally distant from eye and from end of snout; 

 interorbital region as broad as the upper eyelid; tympanum 

 distinct, not quite half the diameter of the eye. Outer fingers 

 distinctly webbed at the base, toes three-fourths webbed ; 

 disks as large as the tympanum ; subarticular tubercles 

 small, feebly prominent ; no tarsal fold ; no outer metatarsal 

 tubercle. The tibio-tarsal articulation reaches the tip of the 

 snout ; tibia a little more than half as long as head and body. 

 Upper parts with more or less distinct small flat warts, lower 

 granulate. Bluish grey above in spirit (green in life?), 

 uniform or with small irregular black spots, whitish beneath, 

 throat sometimes speckled with greyish. Male with an 

 external vocal sac and brown nuptial rugosities on the inner 

 finger. 



From snout to vent 50 mm. • 



Three specimens from Wendessi ; others from the Arfak 

 Mountains at an altitude of 8000 feet. 



Tlylella chloronota. 



Tongue oval, slightly nicked. Head as broad as long; 

 snout rounded, scarcely prominent, as long as orbit ; canthua 

 rostralis distinct ; loreal region nearly vertical ; interorbital 

 space broader than the upper eyelid; tympanum distinct, 

 about half the diameter of the eye. Outer fingers one-third 

 webbed ; toes nearly entirely webbed ; disks of fingers as 

 large as the tympanum ; subarticular tubercles moderate. 

 The tibio-tarsal articulation reaches the tip of the snout ; 

 tibia not quite half length of head and body. Skin smooth 

 above ; throat, belly, and base of lower surface of thighs very 

 coarsely granulate ; no fold across the chest. Green above, 

 white beneath, the green colour forming a narrow stripe 

 along the upper surface of the thighs. Male with an internal 

 vocal sac and brown nuptial rugosities on the inner finger. 



