PROC. BIOL. SOC. WASH. 93(3), 1980, pp. 714-724 TWO NEW SPECIES OF CENTROLENELLA FROM BOLIVIA (ANURA: CENTROLENIDAE) David C. Cannatella Abstract. — Two new species of glass-frogs, Centrolenella bejaranoi and C. bergeri, are described from the cloud forest of the Amazonian slopes of Bolivia. One species is allied to the C fleischmanni group; the other is apparently a member of the C. prosoblepon group. This is the first record of the family Centrolenidae from Bolivia. A recent checklist (Duellman, 1977) of the centrolenid frogs shows that they are present in most countries in South America; notable exceptions are Chile, Paraguay, Uruguay, and Bolivia. The apparent absence of these glass-frogs from Bolivia is surprising, because the yungas region of the Amazo-nian slopes certainly offers suitable habitat, and Centrolenella are known from southern Peru (Duellman, 1976). In fact, the absence of Bolivian Cen-trolenella is an artifact of collections; two recently discovered glass-frogs are described in this paper. In January 1979, Thomas J. Berger and I collected in the yungas of the Chapare region, northeast of Cochabamba, Bolivia (Fig. 1). From the city of Cochabamba (2,600 m) the road winds northeasterly to a pass (3,370 m, km 40.5) and descends through the town of Colomi (3,240 m, km 47.7) in the drainage of the Rio Corani. At about 3,000 m the upper edge of the pristine forest is reached; tree ferns and viney bamboo are present. The road heads east and enters the drainage of the Rio Santa Isabel. The cloud forest on the upper slopes of the valley is virtually uncut (Fig. 2); numerous streams drain the slopes. There is a short tunnel through the mountainside at km 86.8, 1,950 m. From km 101 to km 122 the road descends rapidly from 1,950 m to 860 m. The small village of Villa Tunari is at km 160 (300 m). One of our collection sites was a tiny rivulet at km 102, 1,980 m, 15.2 km NE (downhill) of the tunnel. Alternatively, the locality can be described as 58.1 km SW Villa Tunari. Our efforts yielded a small collection of frogs, including two new species of Centrolenella. This is the first record of the family Centrolenidae from Bolivia. Methods. — In the following descriptions, the diagnoses follow the format of Lynch and Duellman (1973). The webbing formulae are described as in Savage and Heyer (1967); snout-vent length is abbreviated SVL. For spec-imen comparisons I have examined the material in The University of Kansas
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