[Morphological study of ovum and nymphs of Dipetalogaster maximus (Uhler, 1894) (Hemiptera, Reduviidae, Triatominae)].

Intending to provide new parameters to be used in Triatomines' Taxonomy, vectors of Chaga's Disease and to amplify a large range of knowledge about this species, a study of the structure of the egg and external morphology of the five nymphal instars was done. The eggs show under optical microscope (M.O.), the chorium's surface of the body and the operculum formed by poligonal areas, clearer under scanning electronic microscope (MEV). The apex of the third rostrum segment in all 5 instars nymphs, show 1 + 1 invaginated and elongated structures and the apical portion of the second tarsal segment presents a group of more or less numerous, very long, delicated and golden hairs.