Nanna inermis
General description:
Wing length: ♂ 2.8 - 3.2 - 3.5 mm (8); ♀ 3.4 - 3.6 - 3.7 mm (4).
Biology:
Especially on Calamagrostis. An early flying species with adults in April to May.
Distribution:
Collin (1958)[1] reports that it is widely distributed and gives records from England, Scotland and Wales.
World distribution: Palaearctic: Czech Republic, Denmark, Estonia, Finland, Germany, Hungary, Ireland, Netherlands, Norway, Poland, Russia, Slovakia, Sweden; Russia: European regions.