The external morphology and biology of the immature stages of Hamadryas fornax fornax (Hübner, ) (Lepidoptera, Nymphalidae, Biblidinae) recorded on Dalechampia triphylla (Euphorbiaceae) in Curitiba, Paraná, Brazil are described. Morphological characters are illustrated and described, as a result of observations in scanning electron, stereoscope and optical microscopes, the last two attached to a camera lucida. Results are compared and discussed with immature stages of other species of Biblidinae.
Species of Hamadryas feed on species of Dalechampia, and D. tryphilla is recorded as host plant of H. fornax and further eight species of the genus (Beccaloni et al., 2008Beccaloni, G.W., Hall, S.K., Viloria, A.L., Robinson, G.S., 2008. Catalogue of the hostplants of the Neotropical butterflies. Mongr. Terc. Milênio. 8, 1-536.). Records of species of Hamadryas feeding on other genera of host plants provided by Beccaloni et al. (2008)Beccaloni, G.W., Hall, S.K., Viloria, A.L., Robinson, G.S., 2008. Catalogue of the hostplants of the Neotropical butterflies. Mongr. Terc. Milênio. 8, 1-536. are unlikely and need confirmation. 2b1af7f3a8