S. Mahunka szerk.: Folia Entomologica Hungarica 32/1. (Budapest, 1979)

of virga in unpaired genital lobe of male gradually widening (Fig. 43). - Distribution: Venezuela and Columbia , . . , . beybienkoi sp.nov. 10 (7) Not uniformly dark reddish-brown. First antennái segment shorter than distance between antennái bases. Spine of male pygidium widened basally. 11 (12) Pronotum small, posterior margin strongly convex; reddish-brown, elytra and wings with a yellow stripe, and always fully developed. - Distribution: South America lineare (Eschscholtz, 1822) 12 (11) Pronotum larger, much less strongly convex posteriorly. 13 (14) Pronotum transverse. Elytra and wings always fully developed. General colouration deep black and bright yellow. Male cerci typical, slightly arcuate. Pygidium in a superior view as given in Fig. 46. - Distribution: South and North America taeniatum (Dohrn, 1862) Figs. 45-48. Male end of abdomen with cerci of 45= Doru unicolor Brindle, 1971; 46= D. taeniatum (Dohrn, 1862); 47= D. gracilis (Burmeister, 1838); 48= D. luteipes (Scudder, 1876) (after Brindle) 14 (13) Pronotum as wide as long. 15 (18) Wings present and visible. 16 (17) Pronotum widened posteriorly. - Distribution: Brasil . . . . -, . , cincinnatoi Machado, 19 6 17 (16) Pronotum parallel-sided. - Distribution: South America . . . ,_ luteipes (Scudder, 1876) 18 (15) Wings absent or concealed. 19 (20) Pronotum usually widened posteriorly. Abdomen comparatively long, dark red. Mal» cerci (Fig. 47) with branches generally with a double curve, inner tooth about twothirds from base. - Distribution: Brasil, Peru, Bolivia, Columbia and Venezuela gracilis (Burmeister, 1838) 20 (19) Pronotum parallel-sided. Abdomen shorter, usually blackish. Male cerci (Fig. 48) evenly curved, inner tooth about three-quarters from base. - Distribution: Brasil, Argentina, Peru, Bolivia, Columbia and Surinam luteipes (Scudder, 1876) The species Doru cincinnatoi Machado, D. luteipes (Scudder) and D. gracilis (Burmeister) need further revision. It is especially noteworthly that luteipes may have winged and unwinged individuals ?