Diptera (order)　　Latin　《insect》

　 An English common name is true fly.　The Latin "di" is two in English, and "ptera" is wing, so Diptera is an insect with two wings.　Diptera are a diverse species that contains 100 or more families.　Diptera perform complete metamorphosis (holometaboly).

　 Aquatic Diptera of which egg, larva and pupa spend their time underwater, is highly important to fly fishing.　Because aquatic Diptera exists in abundance in lakes and rivers and is seen all year round in many cases, it has become a staple food for fish.　On the other hand, many of the noxious insects that attack an angler at the water's edge are terrestrial Dipetra included in this order.

　 Some of the family names of typical Diptera are: Chironomidae (midge), Tipulidae (crane fly), Culicidae（mosquito), Empididae (dancing fly), Simuliidae (Hawthorn fly, black gnat, smut), Ceratopogonidae (no-see-um), Scathophagidae (dung fly), Tabanidae (horse fly), Blephariceridae, Dolichopodidae, Eriopterinae, Deuterophlebiidae, Psychodidae, Nymphomyiidae, Dixidae, Athericidae, and Stratiomyidae.

【Reference】Aquatic insects of north America, 1996 (1978).　Aquatic insects of Japan (in Japanese), 2005.

→staple food, midge, each word,