Other Common Names
Grass Flies, Stem-miner Flies, Eye Gnats, Pecker Gnats
Numbers
~280 spp. in ~55 genera in our area
(1), close to 3,000 spp. in ~200 genera worldwide
(2)Identification
Ocellar triangle usually large, shiny
Habitat
common in meadows and grassy areas, though found in a variety of habitats
Food
In most spp., larvae feed on grass stems (Poaceae, Cyperaceae, Typhaceae). Some are pests of cereals. Some spp. are saprophages, scavengers, parasites, or predators.
Life Cycle
Most hibernate as larvae; some as adults.
Remarks
Some spp. (the so-called 'eye gnats') are vectors of yaws and pink eye. Some pollinate orchids or Araceae.