Micropygomyia (Sauromyia) petari sp. nov. (Diptera, Psychodidae, Phlebotominae) from speleological province of the Vale do Ribeira, São Paulo State, Brazil, is described and illustrated. This new taxon belongs to oswaldoi series.
Micropygomyia (Sauromyia) petari sp. nov.; Phlebotominae; Psychodidae; taxonomy; Vale do Ribeira