PROC. BIOL. SOC. WASH. 94(2), 1981, pp. 404^12 TWO LITTLE-KNOWN SPECIES OF ELEUTHERODACTYLUS (AMPHIBIA: LEPTODACTYLIDAE) FROM THE SIERRA DE LA MACARENA, COLOMBIA William F. Pyburn and John D. Lynch Abstract. — Two sympatric species of Eleutherodactylus occur in the cloud forest of La Macarena, Colombia. One is an undescribed species, herein named Eleutherodactylus savagei. This species resembles E. fenes-tra t us, from which it differs in skin texture, in having a heel tubercle, and in throat pattern. The other Macarena species is Eleutherodactylus frater. The species E. savagei and E. frater are morphologically similar and have similar breeding calls, but appear to be reproductively isolated from each other by differ-ences in habitat, period of activity, and possibly by subtle differences in call. A field party from the University of Texas at Arlington collected speci-mens and obtained voice recordings of two species of Eleutherodactylus in the cloud forest of the Macarena Mountains, Departamento del Meta, Co-lombia, in March 1971. The calls were recorded with a Uher 4000 Report L tape recorder and sound spectrograms were made from the tapes in the laboratory with a Kay Elemetrics Corporation "Sona-Graph." One of the species is Eleutherodactylus frater, a small arboreal form whose relationships have been in doubt. The other species is unnamed. For it, we propose the name: Eleutherodactylus savagei, new species (Figs. 1, 2) Holotype. — UTA 3535, an adult male taken on the Sierra de la Macarena, ca. 35 km WSW Vistahermosa, Depto. Meta, Colombia, 1097-1128 m, on 20 March 1971 by W. F. Pyburn. Paratypes.— UTA 3525-29, 3536-38, 5608-18; USNM 218054-62; AMNH 107557-65; CM 76154-62; KU 187001-09; all topotypes collected 17-20 March by W. F. Pyburn, J. R. Glide well, and J. Taulman. Diagnosis. — 1) Skin of dorsum finely shagreened becoming more coarse posteriorly, that of venter smooth; no dorsolateral folds; 2) tympanum prom-inent, its length about Vs eye length; 3) snout subacuminate in dorsal view,
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