This paper provides the first species list of butterflies from Espinilho State Park (30°11'S, 57°30'W) and surroundings in southwestern Rio Grande do Sul state. From March 2003 to January 2004, four field expeditions were carried out, lasting five days each. The study covered areas with "Savana Estépica Parque" vegetation and riparian forest inside the park boundary and on its surroundings. The list included 97 species, 10 of which are new records for Rio Grande do Sul.
Lycaenidae; Nymphalidae; protected areas; riparian forest; Savana Estépica Parque
