Key to species of Aciuroides

1. Wing mainly brown with triangular hyaline incisions; hyaline mark in apical half of cell dm not extending anteriorly into cell r4+5 (Figs. 10–11). (Paraguay, Brazil)........................................................ A. insecta Hendel

- Wing mainly yellow with brown and hyaline spots in male (Fig. 8) or hyaline with 4 brown crossbands in female (Fig. 9). Hyaline mark in cell dm between crossveins r-m and dm-cu extending anteriorly into cells r4+5 and r2+3. (Brazil, Argentina, Paraguay, Costa Rica)...................................................................... A. gephyra Hering