Peracca (Robustacca) nigrifrons subgen. & sp. nov. female holotype. A Head in dorsal view; B–D habitus in lateral (B), dorsal (C) and ventral view (D); E female abdominal apex in ventral view, the subgenital plate has the anterior area hidden under the 7th sternite in the shrunken specimen; F apical tergites and cerci; G, H pronotum in dorsal (G) and lateral view (H); I thoracic sternites; J ovipositor. Abbreviations: 7th seventh abdominal sternite, m membranes, ov base of ovipositor, sg apical lobes of subgenital plate.