"Chalcosyrphus nemorum" . . "Animalia" . "Diptera" . . . . "(Fabricius 1805)" . . . . . . . . . . . "Chalcosyrphus" . . "Arthropoda" . "Syrphidae" . . "Chalcosyrphus nemorum (Fabricius 1805)" . "Insecta" .