Morfologia externa dos estágios imaturos de heliconíneos neotropicais: VII. Dryadula phaetusa (Linnaeus) (Lepidoptera, Nymphalidae, Heliconiinae). As estruturas externas do ovo, larva e pupa de Dryadula phaetusa (Linnaeus, 1758) são descritas e ilustradas, baseadas em microscopia óptica e eletrônica de varredura.External morphology of the immature stages of Neotropical heliconians: VII. Dryadula phaetusa (Linnaeus) (Lepidoptera, Nymphalidae, Heliconiinae). The external features of egg, larva and pupa of Dryadula phaetusa (Linnaeus, 1758) are described and illustrated, based upon light and scanning electron microscopy.