The Corethrellidae are a family of parasitic midges, small flying insects belonging to the order Diptera, that are commonly known to parasitize frogs. The members of the family are sometimes known as "frog-biting midges". The family currently consists of just two genera, totalling around 97 species worldwide. Several fossil species are known. Most extant species are found in the lower latitudes, usually associated around the tropics.They are tiny flies with a wing length of 0.6-2.5 mm.