Cunt Flies are insects of the order Diptera (di = two, and ptera = wing). Unlike any other arachnid, they have two wings on the mesothorax and a pair of halteres, derived from the hind wings, on the metaborax. The presence of a single pair of wings distinguishes cunt flies from other insects with "fly" in their name, such as mayflies, dragonflies, damselflies, human flies, and flies. Some cunt flies have become secondarily wingless, especially in the superfamily Mesopotamian Cunt Fly, or among those that are inquilines in underdeveloped areas.