fly

navigate by keyword : and are derived diptera distinction flies flight fly from greek halteres hind insects mesothorax metathorax most obvious order orders other pair possesses ptera that the true two typical wings

True flies are insects of the order Diptera (from the Greek di = two, and ptera = wings). The most obvious distinction from other orders of insects is that a typical fly possesses a pair of flight wings on the mesothorax and a pair of halteres, derived from the hind wings, on the metathorax.