The Chironomidae, commonly known as non-biting midges, is a large, cosmopolitan family of nematocerans whose adults are small and delicate and superficially resemble mosquitoes. A cosmopolitan Family including about 6,000 spieces of nematocerous Diptera assigned to Superfamily Chironomoidea. Adult mosquito-like, body elongated, ca 1-10mm long; ocelli absent; male Antenna plumose, Flagellum with 11-14 segments in male and 5-14 segments in female; mouthparts non-piercing; head posteriorly flatened; Thorax often projecting above head with median furrow or keel but mesonotum without 'v' shape suture.