Genus Metriocnemus Wulp, 1874

A genus of ~75 named species that occur in all zoogeographical regions except Antarctica and Oceania. Three subgenera are recognized, namely Metriocnemus s. str.; Crymaleomyia Ashe et O’Connor, 2000; and Inermipupa Langton et Cobo, 1997 (see Ashe & O’Connor 2012). A review of the genus was given by Saether (1995). The larvae occur in mosses, phytotelmata, springs, ditches, streams, and lakes and a few species are hygropetric (Andersen et al. 2013).