BREVIORA Museiuiim of Comparative Zoology ('AMUUiDdi:, Mass. Xovkmukk 2, 1959 NrMHKK 1 1;{ A NEW PllVLLOMEDUSA FROM BOLIVIA (SALIENT I A, HYLIDAE) By Benjamin Sitreve In 1954 Carl Gans and Padre F. S. Pereira, C.M.F. collected amphibians and reptiles in the state of Mato Grosso in Brazil and the Department of Santa Cniz in Bolivia. W. C. A. Boker-man of the Departaniento do Zoologia, Sao Paulo. Brasil, did some preliminary work on identifying' the amphibia, while I was called upon to complete this task. While doing so, I discovered the novelty described here. Dr. Gans, who is planning to publish a complete report on his collection, has graciously presented about half of the am})hibians to the Museum of Comparative Zool-ogy, including the type of the new form, the remaindei-going to the Carnegie Museum of Pittsburgh, Pennsylvania. P II YLLO MEDUSA PAILONA sp. UOV. Type. Museum of Comparative Zoology 29677, an adult male, from El Pailon, 5 kilometers from the eastern shore of the Rio Grande, altitude 350 meters. Department of Santa Cruz, Bolivia, collected by Carl Gans and P. S. Pereira March 5, 1954. Pamtffpes. M.C.Z. 29(578-7!) and Carnegie Museum 36278-80, all adult males, with the same data as the type. Diagnosis. Apparently most closely allied to Pkyllomedusa sauvagii Boulenger but differing in apparently smaller size, longer hind limbs, immaculate venter and other aspects of colora-tion. Description. Tongue slightly nicked behind; vomerine* teeth in two slightly oblique groups between the choanae; snout longer