Larvae and pupae of Scolecocampa medara (Schaus) were collected in galleries inside decaying tree trunk
where larvae were found feeding. Descriptions and illustrations of the last instar and pupa, as well as
information on the natural history of S. medara are here provided. The larval chaetotaxy is compared with
two closely related species, Scolecocampa mochisa (Schaus) (Scolecocampinae) and Hyponeuma taltula
(Schaus) (Herminiinae). In addition, we provide a redescription of the adults, including the morphology
of the male and female genitalia, with a brief taxonomic history of Scolecocampa Guenée and related
genera.