PROC. BIOL. SOC. WASH. 93(4), 1980, pp. 920-927 THE IDENTITY OF THE FROG EUPSOPHUS VANZOLINII FROM RAMADILLAS, NAHUELBUTA RANGE, SOUTHERN CHILE J. R. Formas Abstract. — The frog Eupsophus vanzolinii is shown to be a species of the genus Alsodes. The species is redescribed on the basis of 38 fixed speci-mens, and natural history notes on the species are presented. Donoso-Barros (1974) described a new species of leptodactylid frog, Eup-sophus vanzolinii, on the basis of specimens from Ramadillas (73°15'S, 37°15'W), at 100 m elevation on the western slope of the Nahuelbuta Range, Arauco Province, Chile. Little comment has been made concerning the sys-tematic status of this species, although Lynch (1978) tranferred E. vanzolinii to the genus Alsodes on the basis of specimens collected by W. E. Duellman in Cabreria (73°7'S, 50'W), Parque Nacional Nahuelbuta, 1,030 m elevation, Malleco Province, Chile. The air line distance between these points is 65 km. I analyzed the frogs collected by Duellman in Cabreria, which Lynch (1978) considered Alsodes vanzolinii, and the specimens found by Donoso-Barros in Ramadillas, and concluded that the frogs of the two places are different species. The frogs from Cabreria were previously identified as Eupsophus coppin-geri {= Alsodes monticola) (Iturra and Veloso, 1975), and as E. vanzolinii (Duellman and Veloso, 1978). Grandison (1961) used the name Eupsophus coppingeri {= Alsodes monticola) for the following frogs from Cabreria: Chi-cago Natural History Museum 44210-44214, 44216-44219, Cabreria, 800 m, Nahuelbuta, Angol; 40136, Nahuelbuta, Angol. According to my colleague Alberto Veloso, the frogs of Cabreria are a new species which is now being described by him. As a result of the study of the specimens collected by Donoso-Barros in Ramadillas I conclude that Eupsophus vanzolinii Donoso-Barros, 1974, must be transferred to the genus Alsodes because the males have spiny excrecences on the thumb and chest, the distal edge of the xiphisternum is notched, the nasal bones are large, the cultriform process is long and the anterior end extends between the palatines. Redescription of Alsodes vanzolinii Fig. 1 Diagnosis. — Alsodes vanzolinii is a moderate sized species that can be distinguished from it congeners by the following combination of characters:
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