Two New Species of Ololygon (Anura: Hylidae) from the Venezuelan Guyana

T HE neotropical hylid frogs that were loosely referred to the Hyla rubra group by many workers (Duellman, 1970; Lutz, 1973) were shown to have a unique sperm morphology by Fouquette and Delahoussaye (1977). They resurrected the generic name Ololygon Fitzinger, 1843 (type species-H. strigilata Spix, 1824) to include members of that group. Subsequently, several taxonomic additions and changes have been made affecting Ololygon. Hoogmoed and Gorzula (1979) named 0. trilineata from the llanos of Venezuela. Describers