O presente trabalho apresenta uma relação das espécies de borboletas que ocorrem no Parque Estadual do Espinilho (30°11'S, 57°30'W) e entorno no extremo sudoeste do Rio Grande do Sul. Foram realizadas quatro expedições a campo, com duração de cinco dias cada, entre março de 2003 e janeiro de 2004. As amostragens contemplaram áreas com vegetação de Savana Estépica Parque e Mata Ciliar dentro dos limites do parque e entorno. Foi elaborada uma listagem com 97 espécies de borboletas, havendo 10 novos registros para o Rio Grande do Sul.

ABSTRACT. The composition and the hourly variation of butterfly species (Lepidoptera: Papilionoidea and Hesperioidea) throughout the day and the seasons was evaluated in a 1,000 m 2 patch of sandy forest (Restinga forest) on a coastal plain at Itapuã State Park (30º22'S, 51º02'W), Viamão, Rio Grande do Sul, from July 2001 to June 2002. Butterflies were sampled by scanning and focal observations (adapted from ALTMANN 1974) carried out at successive 45 minutes intervals. This methodology proved to be effective in recording the presence and activity of butterflies on a small area. A total of 108 observation hours yielded 326 butterflies from 41 species, 33 genera and five families. Nymphalidae was the most abundant family contributing with 74% of the total individuals. The most abundant species was Eunica eburnea Fruhstorfer, 1907 (Nymphalidae) with 45 individuals registered along the year. General diversity estimates were Dmg = 6.912, H' = 3.012 and d = 0.138. Although there were variations in the daily times of butterfly activity throughout the seasons, there was a general trend for higher activity during the morning period, between 9:00 and 11:45 h.

Neotropical Entomology 36(4): 612-615 (2007) Ocorrência de Lepidopterismo Provocado pela Mariposa Hylesia nigricans (Berg) (Lepidoptera: Saturniidae) no Rio Grande do SulRESuMO -É registrado pela primeira vez o lepidopterismo provocado pela mariposa Hylesia nigricans (Berg) para o sul do Brasil. São apresentados alguns aspectos da biologia da espécie e relatadas medidas como estratégia preventiva de controle.PaLavRaS-ChavE: Dermatite, mariposa urticante, planta hospedeira, Sul do Brasil aBSTRaCT -Lepidopterism by Hylesia nigricans (Berg) moth is recorded for the first time in southern Brazil. Preventive strategies of control are proposed based on information on the biology and ecology of this moth.kEy wORDS: Dermatitis, host-plant, southern Brazil, urticating moth