Euschistus (Euschistus) olacitus Rolston 1971

(Figs 2, 9–11, 23, 30–32, 48–50, 61)

Male genitalia: Pygophore squared shape. In dorsal view, dorsal rim constricted anterolaterally (Fig. 9); median projection of dorsal rim short, sinuosity deep; superior process of dorsal rim flap-like (Fig. 10). Ventral rim strongly bilobed, concave mesially in ventral view (Fig. 11). In posterior view, ventral rim smooth mesially. Paramere: margin connecting basal and apical process slightly concave; apical process rounded apically; middle process developed, produced as a small tooth (Fig. 23).

Female genitalia: Posterior margin of gonocoxites VIII slightly concave; posterolateral margin of gonocoxites VIII projected posteriorly, reaching at most middle of gonocoxites IX. Gonocoxites IX 2.5 times wider than long, tapering laterally; anterior margin of gonocoxites IX convex (Fig. 48). Laterotergites IX surpassing dorsal band that unites laterotergites VIII in posteroventral view. Posterior region of ductus receptaculi proximalis dilated in a cup-like sclerotized structure. Ductus receptaculi distalis slightly dilated adjacent to anterior annular flange. Pars intermedialis dilated medially (Fig. 61).