Search for: [Subject and Keywords = Insects \(Ptychopteridae, Dixidae\) \- Finland] OR [Subject and Keywords = Owady, muchówki \(Ptychopteridae, Dixidae\) \- Finlandia] OR [Title = Om Finlands Ptychopteridae och Dixidae] OR [Title = Om Finlands Ptychopteridae och Dixidae] OR [Creator = Bergroth, Ernst Evald \(1857–1925\)] OR [Creator = Bergroth, Ernst Evald \(1857–1925\)]