221 



limbs with more or less distinct dark cross-bars ; whitish beneath, 

 throat and breast usually spotted or marbled with brown, 

 hinder side of thighs and lower surface of hind limbs with 

 brown reticulation. Length 71 mm. 



Male with internal vocal sacs. 



Tadpole. — Length of body about I '/ 2 times its width; 

 tail about i'/o times the length of the body and 3 to 4 times 

 as long as deep, its total depth at most about twice the depth 

 of the muscular portion at its base. Nostril nearer to the tip of 

 the snout than to the eye ; eyes superior, rather nearer to the end 

 of the snout than to the spiraculum ; distance between them twice 

 that between the nostrils, and greater than the width of the 

 mouth; spiraculum sinistral, directed upwards and backwards, 

 visible from above and from below, nearer to the vent than to the 

 end of the snout; vent dextral, close to the lower edge of 

 the subcaudal crest. Tail ending in a rounded point; upper 

 crest convex, slightly deeper than the lower one, not extending 

 on to the back. 



Sides and lower edge of lips bordered with papillae, those 

 of the lower border being long and prominent; jaws edged 

 with black; series of teeth 3 , 3/ l 2 1 , the three inner rows of 

 the upper lip broadly interrupted and very short, decreasing 

 in size towards the mouth, the innermost series sometimes 

 very small and inconspicuous; the three rows of lower lip 

 slightly different in length (the outermost the shortest, the 

 innermost the longest), the inner one narrowly interrupted. 



Skin very transparent; on each side of the back behind 

 the eyes a patch of granular skin, sometimes a similar strip 

 on each side of hinder part of back and a large patch on 

 each side of the belly. 



Colour (in life) bright yellow or brick-red above, pale yellow 

 beneath. Length 37 mm. 



BOULENGER recently (I.e., 1920) considers R. labialis as a 

 variety of R. chalconota; I think, however, that it is well 

 distinguished from this species by the characters mentioned 

 under R. chalconota. 



Habitat: Nias ! ; Mentawei islands (Sipora) ; Sumatra (Deli ; 

 Balun ! ; Fort de Kock, 900 m.!; Muarolabu ! ; Muara Sako ! 

 and Sungai Kumbang!, Kurintji); Borneo? (Pulo Matjan?; 

 Serawak?). — Siam ; Malay Peninsula; Singapore. 



