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Genus Sciara

Dark-winged Fungus Gnat - Sciara - female Sciaridae ? - Sciara - male Sciaridae ? - Sciara - male Sciaridae ? - Sciara - male Gnat - Sciara - male Gnat - Sciara - male Gnat - Sciara - male Gnat - Sciara - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Nematocera" (Non-Brachycera))
Infraorder Bibionomorpha (Gnats, Gall Midges, and March Flies)
Superfamily Sciaroidea (Fungus Gnats and Gall Midges)
Family Sciaridae (Dark-winged Fungus Gnats)
Genus Sciara
Synonyms and other taxonomic changes
Sciara Meigen 1803

Synonyms:
Lycoria Meigen, 1800 (suppressed by ICZN (1963): 339)
Molobrus Latreille, 1805
Nowickia Kjellander, 1943 [preocc.]
Nowickiana Kjellander, 1943 [replacement name for Nowickia Kjellander]
Semisciara Kjellander, 1943
Explanation of Names
Greek skiaros 'dark, shady'
Numbers
6 recognized species in our area.(1) (a large number of species recently moved to other genera)

Species: (range data from (1))
Sciara cingulata Rubsaamen, 1894 - Georgia, Mexico (Chiapas)
Sciara futilis Johannsen, 1912 - Wisconsin
Sciara hebes (Loew, 1869) - Holarctic
Sciara ochrolabis Loew, 1869 - CAN (QC); USA (MD, MN, NY, WI)
Sciara robusta Walker, 1848 - Ontario (male not known)
Sciara sciophila Loew, 1869 - USA (MA, OH, VT, VA, DC)

In addition, Mohrig et al (1) list 8 species originally described in Sciara as incertae sedis, thus their generic affinities are unclear. Species described by Thomas Say in Sciara are now treated as nomina dubia, as the types are lost and the descriptions are inadequate.
Size
Typically about 2 mm
Habitat
Potted plants, various decaying organic materials.
Works Cited
1.Revision of the black fungus gnats (Diptera: Sciaridae) of North America
Mohrig W., Heller K., Hippa H., Vilkamaa P., Menzel F. 2012. Studia dipterologica 19: 141–286.