We report on a small collection of parachuting frogs from Sumatra and Java. Three new species are described. Rhacophorus achantharrhena is similar to R. dulitensis and R. prominanus and differs from these species by a suite of characters including morphology of the supratympanic fold, digital webbing, coloration, and morphometrics. These three species are unusual in having white visceral and parietal peritonea. Rhacophorus catamitus is a small species similar to R. angulirostris and differing from this species by having a calcar at the heel and reduced digital webbing. Rhacophorus barisani resembles R. baluensis but differs from this species in color pattern, habitus, webbing of the fingers, and morphology of the dermal appendages. A new specimen of Sumatran R. pardalis is described and compared to the holotype of R. pulchellus. Rhacophorus prominanus is reported from Gunung Rajabasa, Lampung. Two specimens are described and compared to Bornean R. dulitensis and R. prominanus from the Malay Peninsula. Rhacophorus tunkui Kiew is a junior subjective synonym of Rhacophorus prominanus Smith. Finally, we describe new specimens of Rhacophorus margaritifer from Cibodas, Java. Skeletons of the new species and of R. margaritifer are described in detail. Superficial jaw and throat musculature appears to be relatively conservative within the genus.
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