Detailed and Complete Descriptions of Immature Stages of Two Predatory Species of Eupeodes Osten Sacken, 1877 (Diptera: Syrphidae)

With over 40 species, Eupeodes Osten Sacken, 1877, is a common aphidophagous hoverfly genus (Diptera: Syrphidae: Syrphinae) with a worldwide distribution. The immature stages of Eupeodes are well known, since 23 species have been reared, but only 8 species have been described. All known immature stages of Eupeodes species have predatory feeding habits, mainly on aphids and other soft-bodied Hemiptera, for which some of its species are commonly used as agents of biological control programs. In this work, the puparium of Eupeodes bucculatus (Rondani, 1857) is detailed and re-described, and the complete morphology of all immature stages of the life cycle of Eupeodes corollae (Fabricius, 1794) is documented by using stereomicroscope and scanning electron microscope techniques. An update to the taxonomic key for the known larvae/puparium of Eupeodes species is also provided.