The Psychodinae are the nominate subfamily of moth flies (Psychodidae), also known as drain flies. Like most of their relatives, they are usually found in damp habitat

Habitat

* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...

s; some occur in cave

Cave

A cave or cavern is a natural underground space large enough for a human to enter. The term applies to natural cavities some part of which is in total darkness. The word cave also includes smaller spaces like rock shelters, sea caves, and grottos.Speleology is the science of exploration and study...

s. The small larva

Larva

A larva is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle...

e are aquatic

Aquatic animal

An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...

 or semiterrestrial; the imagines

Imago

In biology, the imago is the last stage of development of an insect, after the last ecdysis of an incomplete metamorphosis, or after emergence from the pupa where the metamorphosis is complete...

 feed on plant sap

Sap

Sap may refer to:* Plant sap, the fluid transported in xylem cells or phloem sieve tube elements of a plant* Sap , a village in the Dunajská Streda District of Slovakia...

 and nectar or not at all. Psychodinae are found in almost every country on Earth, including some subantarctic isles.

Selected genera

• Alepia
• Atrichobrunettia
• Bazarella Vaillant, 1961
• Berdeniella Vaillant, 1976
• Clytocerus Eaton, 1904
• Lobulosa Szabo, 1960
• Neotelmatoscopus
• Pericoma Walker, 1856
• Philosepedon Eaton, 1904
• Platyplastinx
• Psychoda Latreille, 1796
• Satchelliella
• Telmatoscopus Eaton, 1904
• Trichopsychoda Tonnoir, 1922
• Tonnoira Enderlein, 1937