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.