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

Identification key to the South American species 1 (2) 2 (1) 3 (4) 4 (3) 5 (6) Elytra blackish brown or dark unicolorous brown. Wings yellow or white. Male last tergite with ten tubercles near posterior margin. - Distribution: Venezuela leucopteryx Burr, 1912 Elytra striped or unicolours. Wings when present, not conspicuously lighter in colour than elytra. Male last tergite with two tubercles near posterior margin. Pronotum strongly transverse. Elytra shorter than pronotum, wings absent. - Distribution: Peru and Ecuador _ . „ ,„_„ robustum Bnndle, 1971 Pronotum not strongly transverse. Elytra longer, at least meeting along sutures. Pronotum longer than broad and evenly widened posteriorly or with lateral margins sinuate; yellow with median longitudinal blackish stripe usually present. Male pygidium spatulate. - Distribution: Argentina , . „. & platense Borelli, 1912 II Figs. 41-44. 41= Doru beybienkoi sp. nov. head, pronotum and elytra, 42= male end of abdomen with cerci, 43 = male genital organ; 44= D. leucopteryx Burr, 1912, male end of abdomen with cerci (Original) 6 (5) Pronotum quadrate or transverse. 7 (10) Uniformly dark reddish-brown in colour. 8 (9) Elytra long, about two and half times as long as wide; posterior margins concavely truncate, but inner angles visibly extending posteriorad. Wings well developed, about half as long as elytra. Pronotum slightly longer than wide. Two tubercles each near posterior margin on dorsal surface of last tergite. Male pygidium gradually attenuating, then terminating in a narrow, pointed peg (Fig. 45). Cerci narrowed. Basal vesiculum of virga in unpaired genital lobe of male expanded, without a gradual trasition. - Distribution: Brasil and Venezuela . „ . „ unicolor Bnndle, 1971 9 (8) Elytra shorter, about twice as long as wide, posterior margins concavely truncate, but inner angles of margin hardly extending posteriorad. Wings absent. Pronotum as long as wide. Merely one tubercle each near posterior margin on dorsal surface of last tergite. Male pygidium as in Fig. 42, cerci more robust. Basal vesiculum