the world > animals > invertebrates > phylum Arthropoda > class Insecta > order Diptera or flies > [noun] > suborder Nematocera > family Trichoceridae > trichocera hyemalis (winter gnat) (2)
any of various small crane flies of the Holarctic family Trichoceridae, which sometimes swarm on winter days; esp. the European Trichocera hiemalis.
(a) = winter gnat n. (now rare); (b) U.S. any non-biting midge of the genus Diamesa, which emerges from rivers in large numbers in winter.