What is "megamerinidae"

The Megamerinidae are a family of flies ( Diptera) with about 11 species in the genera Protexara Yang, Megamerina Rondani, and Texara Walker. They are marked by an elongated, basally constricted abdomen. The family is typically placed in the superfamily Diopsoidea (but may be placed in Nerioidea by some authors).