Zootaxa 1256: 49-57 (2006) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA Copyright © 2006 Magnolia Press ISSN 1175-5334 (online edition) A new species of Curius Newman (Coleoptera: Cerambycidae) from Venezuela with notes on sexual dimorphism within the genus EUGENIO H. NEARNS & ANN M. RAY Department of Entomology and Nematology, University of Florida, Gainesville, FL, 32611 USA. E-mail: gnearns@ufl.edu Department of Entomology, University of Illinois at Urbana-Champaign, 320 Morrill Hall, 505 South Goodwin Avenue, Urbana, IL, 61801 USA. E-mail: annray@life.uiuc.edu Abstract A new species, Curius chemsaki (Coleoptera: Cerambycidae: Cerambycinae: Curiini), from Venezuela is described. Features distinguishing the new species from its congeners as well as a key to the four species are presented. Sexual dimorphism in pronotal and prosternal morphology within the genus is also discussed. Key words: Cerambycinae, Curiini, South America, taxonomy, key, long-range attractant, pheromone gland pores Introduction As currently defined, the genus Curius Newman, 1840 contains three species: Curius dentatus Newman, 1840, known from southeastern United States, Curius panamensis Bates, 1885, known only from Panama, and Curius punctatus (Fisher, 1932), an endemic Cuban species (Monne, 2005; Monne & Hovore, 2005; Nearns et al., 2005; Peck, 2005). LeConte (1873) designated the tribe Curiini (= Curii) with Curius as the type genus and synonymized Plectromerus concinnatus Haldeman, 1847 with C. dentatus. Linsley (1963)