Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

National Moth Week photos of insects and people. Here's how to add your images.

Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


Family Cecidomyiidae - Gall Midges and Wood Midges

Rhopalomyia hirtipes, spent pupal case - Rhopalomyia hirtipes Wood Midge Borer ID Request - Neolasioptera perfoliata twig gall on dogwood - Resseliella clavula Spruce gall midge  - Piceacecis tsugae Asphondylia from Liatris punctata - Asphondylia lacinariae Asteromyia carbonifera Lasiopteridi male? - male
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 Cecidomyiidae (Gall Midges and Wood Midges)
Synonyms and other taxonomic changes
taxonomy here is adopted from Gagné & Jaschhoff(1) who have expanded the family from the traditional 2-3 subfamilies to six
Explanation of Names
Cecidomyiidae Newman 1835
Well over 1000 described species in ~190 genera in our area(2), ~6300 species in ~760 genera worldwide(3)(4); actual numbers are expected to be much higher: the estimated Canadian fauna alone contains ~1600 species(5)
1-5 mm (some up to 8 mm)(2)
Minute, delicate flies with long legs and usually relatively long antennae, and with reduced wing venation(6)
Most are gall makers. Others feed on plants. A few live on decaying matter, some are predators, a few, parasitic; some live as ant/termite inquilines(2)
Life Cycle
in several genera, larvae reproduce (paedogenesis); this seems to be restricted to fungus-feeding forms(2)
the Hessian fly (Mayetiola destructor) is an important pest of wheat; another pest is the midge of red clover Dasineura leguminicola. Among the ones that feed on aphids Aphidoletes aphidimyza is used as a biocontrol. Some species may reproduce without reaching the adult stage (paedogenesis)(7)
Print References