Abstract. The natural occurrence of predation on Leptinopterus burmeisteri Arrow and Leptinopterus femoratus (Olivier) (Coleoptera, Lucanidae, Lucaninae) by Zelurus angularis (Stål) (Reduviinae), Apiomerus mutabilis Costa Lima, Seabra & Hathaway and Apiomerus nigricollis Stål (Apiomerinae) (Hemiptera, Reduviidae), in the state of São Paulo, Brazil, is recorded. Additional data on the predatory habits of A. nigricollis are also presented here.

Lampygnatha ikuoi gen. & sp. nov. is described and illustrated from southeast Brazil. A hypothesized mimicry complex that involves the new taxon, Allocerus spencei Kirby (Coleoptera: Cerambycidae) and Cratomorphus splendidus (Drury, 1782) (Coleoptera: Lampyridae) is discussed. A key to the identification of all genera of New World Stigmoderini is presented.

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Agripialus gen. n. and Mutipialus gen. n. are described to accommodate the following species: A. campos sp. n., A. variabilis sp. n., A. itatiaia sp. n., A. caparao sp. n., M. dilatus sp. n., and M. monticolus sp. n. All are from southeastern and southern Brazil. Diagnostic characters suggest a closer phylogenetic relationship between these two genera, than to any other described genus.

Conognatha (Pithiscus) mielkei Pineda, Barros and Koike n. sp. (Coleoptera: Buprestidae), from southeast Brazil is described and illustrated. We also report five new state records for Brazil for the following species: Conognatha (C.) ovatula, Conognatha (P.) apicalis, C. (P.) excellens, C. (P.) insignis and C. (P.) sellovii.

Conognatha (Pithiscus) continua Pineda, Koike & Barros sp. nov. (Coleoptera: Buprestidae: Stigmoderini), from southeast Brazil is described and illustrated. A simplified identification key for the Conognatha (P.) continua species-group is proposed.