Chromatomyia norwegica (Ryden, 1957)

Material examined.

AG: Wohlen [47°21'N, 8°18'E, 450m a.s.l.], 1 ♂, 21.v.2011. GR: Alp Flix [46°32'N, 9°38'E, 1830m a.s.l., banana bait], 2 ♂♂, 4.-8.viii.1975; Zuoz-Nüd [46°36'N, 9°58'E, 1700m a.s.l.], 1 ♂, 7.viii.1996, B. Merz & G. Bächli leg. VS: Oberwald [46°31'N, 8°20'E, 1820m a.s.l., banana bait], 2 ♂♂, 13.-15.viii.1975; Riederalp [46°23'N, 8°02'E, 2050m a.s.l., banana bait], 25 ♂♂, 31.vii.-8.viii.1976.

Distribution.

North America: Canada, United States; Europe: Czech Republic, Finland, Germany, Latvia (Karpa 2008), Lithuania, Norway, Poland, Slovakia, Sweden. First record from Switzerland.

Biology.

Host plants Arctagrostis, Brachypodium, Calamagrostis, Cinna, Deschampsia, Melica .