Perigonia leucopus
Diagnostic description:
Forewing upperside similar to Perigonia stulta but base and postmedial area shaded with grey and with a conspicuous lunate patch on the outer margin between the apex and M3. Hindwing upperside as in Perigonia stulta but brown marginal band narrower towards wing apex. Hindwing underside with tornal patch paler than the rest of the wing but not yellowish (as it is in Perigonia stulta).
Male genitalia: Harpe triangular, apically obtuse (not truncate). Phallys with two setae on the whip and two others near the apical margin opposite the whip; whip shorter than in Perigonia stulta, being about half as long again as the diameter of the phallus.