Stolidoptera tachasara
A distinctive species, with a broad lobe on the costal margin of the hindwing that projects beyond the edge of the forewing at rest (as in species of Laothoe, Phyllosphingia and Hypaedalea). Forewing irregularly lobed, apical lobe from Rs3 to M1, including M1, the first deep sinus behind this vein. Distal margin of hindwing entire; costal margin enlarged; discal cell broad; crossveins m1-m2 and m2-m3 straight, oblique; M2 central; M3 and CuA1 rather close together. Head slightly crested. Eye small, lashed. Antenna long and slender, not at all clubbed; apical hook long and gradual, end-segment short. Spines of abdomen in one row, those of posterior tergites long, conical. Palps long, projecting, compressed, the two together acutely triangular.Spines of abdomen rather weak, flattened.Legs short-scaled. Tail short obtusely triangular (male) or short, a single narrow tuft (female).
Male genitalia: Seventh abdominal sternite small, not spinose. Uncus and gnathos similar to those of Hemeroplanes ornatus, but not contiguous; lobes of the uncus triangular; gnathos process suddenly hooked apically. Valve long. Harpe upcurved almost at 90°, with a short, broad apical hook; right and left harpes symmetrical. Phallus similar to Madoryx oiclus, the projecting dorsal, apical, broad lobe dentate along the edge, asymmetrical.