The tribe Lepturini in South America (Coleoptera: Cerambycidae: Lepturinae) Author Monné, Marcela L. Author Monné, Miguel A. text Zootaxa 2008 2008-08-27 1858 37 52 journal article 10.5281/zenodo.274444 34373a5f-2d4f-4c16-9e42-c6d586daada7 1175-5326 274444 Megachoriolaus Linsley, 1970 Megachoriolaus Linsley, 1970 : 128 ; Monné, 2006 : 127 (cat.). Type species: Megachoriolaus chemsaki Linsley, 1970 (original designation). According to Chemsak (2005) , this genus has a moderately robust form; the elytra parallel–sided or slightly expanded posteriorly; antennae relatively short in both sexes, basal antennomeres shiny, usually abbreviated, clothed with coarse suberect hairs, antennomere 4 short, outer antennomeres thickened or subserrate. Pronotum with punctation not finer than that of base of elytra; prosternum with intercoxal process very narrow; mesosternum with intercoxal process prominent, not recessed between coxae. Legs with procoxae prominent; posterior tarsi distinctly shorter than tibiae, first segment usually not longer than remaining segments combined. Elytra with fine, non-elevated costal lines. Abdomen with last segment in male not excavated. Megachoriolaus includes eight species from Mexico and Central America : M. chemsaki Linsley, 1970 , M. flammatus (Linsley, 1961) , M. imitatrix Linsley, 1970 , M. lineaticollis Chemsak & Linsley, 1974 , M. nigricollis Chemsak & Linsley, 1974 , M. patricia (Bates, 1885) , M. spiniferus (Linsley, 1961) , M. unicolor (Bates, 1892) and M. yucatanus Giesbert & Wappes, 2000 , as well as M. cruentus (Martin, 1930) , M. ignitus (Schaeffer, 1908) and M. texanus (Knull, 1941) from the mountains of the southwestern United States . We propose to add three species from South America , previously in Euryptera , by the presence of Megachoriolaus generic characters as elytra parallel–sided, without dorsal carinae. These are: M. atripennis ( Bates, 1870 ) , new combination , M. bicolor ( Gounelle, 1911 ) , new combination and M. venustus ( Breme, 1844 ) , new combination . A new species is described from Brazil (Rondônia) and Bolivia .