Topic summary
Dipterans
Extracted from the Wikipedia article Fly.
Relationships to other insects
Dipterans are holometabolous, meaning that they undergo radical metamorphosis. They belong to the Mecopterida, alongside the Mecoptera, Siphonaptera, Lepidoptera and Trichoptera. The possession of a single pair of wings distinguishes most true flies from other insects with "fly" in their names. However, some true flies such as Hippoboscidae (louse flies) have become secondarily wingless.