A survey of the Cerambycinae species recorded in the Parque Nacional do Itatiaia, Rio de Janeiro State, Brazil, is presented. The data were based on literature, field work and in the collection of the Museu Nacional, Universidade Federal do Rio de Janeiro. Two hundred ninety three species of Cerambycinae are registered, and this represents about 28% of the species that occur in the Atlantic Rainforest. Nineteen new distribution records are registered. Ninety nine species are illustrated. A comparative table showing the respective number of genera and species of Cerambycinae that occur in the Neotropical Region, Atlantic Rainforest and Parque Nacional do Itatiaia is given.

RESUMO É apresentado um levantamento das espécies de Cerambycidae, Disteniidae e Vesperidae que ocorrem no estado do Mato Grosso do Sul, Brasil. Os dados foram baseados na literatura e no acervo da coleção do Museu Nacional, Universidade Federal do Rio de Janeiro. São registradas 229 espécies de Cerambycidae, distribuídas em cinco subfamílias. São registradas duas espécies de Disteniidae e duas de Vesperidae.

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Lane (1943) proposed the genus Zikanita for Zikanita perpulchra Lane, 1943 from Rio de Janeiro, considering it close to Cosmotomidius Melzer, 1931. Marinoni & Martins (1978) considered Acanthoderes (Trichacanthoderes) Tippmann, 1960 a synonym of Zikanita, and transferred the two species, Z. biocellata (Tippmann, 1960) and Z. argenteofasciata (Tippman, 1960), both described from Peru.

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The genus Macronemus Dejean, 1835 is redescribed and two new species are described: Macronemus mimus sp. nov. from Brazil (Bahia to Santa Catarina) and Argentina and Macronemus giuglarisi sp. nov. from French Guiana and Brazil (Amapá, Amazonas). M. verrucosus (Pascoe, 1866) is considered a new synonym of M. asperulus White, 1855. New distributional data and a key to the seven species of the genus are provided.

During the study of the Neotropical Acanthocinini (Coleoptera, Cerambycidae, Lamiinae) a series of papers that describes the diverse cerambycid beetle fauna of the Americas has been produced (e.g. Monné, 1982, 1985, 1998). To help to stabilize the nomenclature for this tribe, we propose several changes concerning the genera Hylettus Bates, 1864 and Nyssodrysternum Gilmour, 1960.

Melzer (1931) proposed the genus Cosmotomidius to accommodate Pogonocherus setosus Audinet-Serville, 1834 and considered the new genus near to Cosmotoma Blanchard, 1845. Following this study, all authors interpreted this action to mean that Melzer had allocated the genus in the tribe Acanthocinini. Cosmotomidius setosus, the only species of the genus, occurs in Brazil from Espírito Santo to Santa Catarina, and also in Paraguay and Argentina. In this contribution we revise Cosmotomidius and propose its transference to the tribe Acanthoderini, describe a new species from Bolivia, and provide new distribution records for C. setosus. The following acronyms are used throughout: ACMT,