LONG-LEGGED FLY

any insect of the family Dolichopodidae (order Diptera). These tiny, metallic blue or green flies prey on smaller insects and are found around damp, marshy places. The male has conspicuous genitalia at the end of the abdomen; cuplike structures on his legs go over the female's eyes during mating. Many species perform unusual mating dances. The elongated larvae have almost no external head structure; they are found in mud, decaying vegetation, and water.