56 



Tadpole. — Length of body nearly twice its width; tail 

 about once and a half the length of the body; eyes lateral; 

 spiraculum sinistral, near the medioventral line; vent dextral. 



Grey, with a median and a pair of lateral dark longitudinal 

 dorsal streaks. Length 50 mm. 



The projecting rudiment of pollex seems to be the only 

 character distinguishing this species from H. infrafrenata. 



Habitat: Bismarck arch. 



34. Hyla humeralis Blgr. 



Hyla humeralis Boulenger, Zool. Jahrb., Suppl. XV, 1, 1912, p. 216. 



Head more depressed than in H. caerulea and //. infra- 

 frenata; snout but little longer than the eye; tympanum 2 / 5 

 the diameter of the eye. Disk of third finger nearly as large 

 as the tympanum; no projecting rudiment of pollex; outer 

 fingers nearly half webbed ; heel reaching a little beyond the 

 tip of the snout; tibia more than half length of head and body. 



Upper parts with scattered, small, granular warts, some of 

 which are capped with deciduous, conical, black, horny tuber- 

 cles ; sides, belly, and lower surface of thighs granulate. 



Colour (in spirit) purple above, more pinkish round the 

 eyes, on the arms, sides of thighs, and hands and feet; white 

 beneath ; no light border to the lower jaw ; upper part of the 

 lower eyelid veined with purple. From snout to vent 100 mm. 



Male with a moderately developed external subgular vocal 

 sac, a curved, acutely pointed, spine-like process on the front 

 side of the proximal' part of the shaft of the humerus and 

 two deciduous black horny plates, studded with spines, on 

 the inner side of the inner finger. 



Closely allied with H. infrafrenata (Boulenger). 



Habitat: New Guinea (Madew, St. Joseph riv., between 

 600 and 900 m.). 



35. Hyla aruensis Horst. 



Hyla aruensis Horst, Notes Leyden Mus., V, 1883, p. 242. 



Hyla infrafrenata part.," Boulenger, Zool. Jahrb., Suppl. XV, 1, 1912, p. 214. 



Tongue oval, slightly nicked behind; vomerine teeth in two 

 short, oblique series between the posterior borders of the 

 choanae. Head broader than long; snout rounded, vertically 

 truncate, as long as or a little shorter than the upper eyelid, 



