PROC. BIOL. SOC. WASH. 100(2), 1987, pp. 337-346 TWO NEW SPECIES OF ELEUTHERODACTYLUS (AMPHIBIA: ANURA: LEPTODACTYLIDAE) FROM BOLIVIA John D. Lynch and Roy W. McDiarmid Abstract. — Eleutherodactylus fraudator, new species, E. mercedesae, new species, and E. rhabdolaemus are reported from cloud forests in Departamento Cochabamba, Bolivia. Eleutherodactylus pharangobates Duellman is placed as a synonym of E. rhabdolaemus Duellman. Although the genus Eleutherodactylus is extraordinarily speciose in many areas of northern South America and especially on the Andean slopes, it is poorly known in southern South America. Presently, the southern terminus of the genus is in north-em Argentina (Lynch 1971, Cei 1 980) where only a single species, Eleutherodactylus dis-coidalis, is recognized. Three species have been reported from Andean Bolivia in con-trast to ten species recorded from adjacent areas in Peru. While such a gradient is con-sistent with the geographic pattern of di-versity characteristic of many groups of tropical organisms, with frogs (especially Eleutherodactylus) this gradient is partially a reflection of collecting efforts. Thus, a se-ries of small collections made by Mercedes S. Foster in 1979 as she travelled down the eastern versant of the Bolivian Andes along the road from Cochambamba to Villa Tu-nari (Cannatella  presented a useful map of the area) are especially noteworthy for the frogs they contain. Her collections, when added to material collected in 1959 from the same area, provide us with some important additions to the Bolivian her-petofauna particularly within the genus Eleutherodactylus. The three species previously reported from Bolivia are E. cruralis (Boulenger), E. fenestratus (Steindachner), and E. pharan-gobates Duellman. The cloud forests of ad-jacent Peru (Departamentos Ayacucho, Cuzco, and Huanuco) harbor ten species: E. cosnipatae Duellman, E. danae Duell-man, E. granulosus (Boulenger), E. lindae Duellman, E. mendax Duellman, E. phar-angobates Duellman, E. platydactylus (Boulenger), E. rhabdolaemus Duellman, E. salaputium Duellman, and E. scitulus Duellman. In addition to the two new species of Eleutherodactylus (described below) and E. rhabdolaemus, Foster obtained one speci-men of E. fenestratus (USNM 257849, Mi-guelito, ca. 99 km from Cochabamba on Cochabamba to Villa Tunari road, Provin-cia Chapare, Departamento Cochabamba, 1770 m). This record is from the southern edge of the distribution of E. fenestratus, a wide-ranging species recorded from several localities in the southern Amazon Basin (Lynch 1980). Our use of abbreviations and terminology follows Lynch (1980) and Lynch and Myers (1983). Eleutherodactylus fraudator, new species Figs. 1, 2 A Holotype.-US'NM 257847, aduU male, taken 73.5 km from Cochabamba on Co-chabamba to Villa Tunari road, Provincia Chapare, Departamento Cochabamba, Bo-livia, ca. 2690 m, on 23 Sep 1979, Mercedes S. Foster collector. Paratopotype.-XJS^M 257846, adult male, taken with holotype.