The genus Medetera (Diptera: Dolichopodidae) in the Czech Republic with first records of twelve species.

The faunistics of long-legged flies of the genus Medetera Fischer von Waldheim, 1819 in the Czech Republic (further subdivided into Bohemia and Moravia) are investigated. A total of 61 species are listed, new records of 34 species presented and numerous previously published records discussed. Twelve species are recorded from the Czech Republic for the first time: Medetera acanthura Negrobov & Thuneberg, 1970, M. belgica Parent, 1936, M. betulae Ringdahl, 1949, M. brevitarsa Parent, 1927, M. freyi Thuneberg, 1955, M. incrassata Frey, 1909, M. inspissata Collin, 1952, M. kerzhneri Negrobov, 1966, M. parenti Stackelberg, 1925, M. prjachinae Negrobov, 1974, M. pseudoapicalis Thuneberg, 1955, and M. unisetosa Collin, 1941. Six other species are recorded from Bohemia for the first time: Medetera annulitarsus von Roser, 1840, M. feminina Negrobov, 1967, M. insignis Girschner, 1888, M. jugalis Collin, 1941, M. muralis Meigen, 1824, and M. lorea Negrobov, 1967; and six species from Moravia for the first time: Medetera ambigua (Zetterstedt, 1843), M. caeruleifacies Naglis & Negrobov, 2014, M. excellens Frey, 1909, M. infumata Loew, 1857, M. melancholica Lundbeck, 1912, and M. seguyi Parent, 1926.