Herein, the puparium of Sargus thoracicus Macquart, 1834 collected in decaying organic material, on the Campus of Universidade Federal Rural do Rio de Janeiro, Seropedica, Rio de Janeiro State is described. The description is based on a single larva collected and reared in laboratory till the emergence of the adult. Some biological notes on the larva are also presented.
decomposition; puparium; Sarginae; Sargus thoracicus