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This is Microcercuis kerteszi (Becker, 1910), Chloropidae, Oscinellinae. In earlier times (going backwards) it was included in the genera Incertella, Tropidoscinis, Conioscinella and Oscinella. The black enlarged and slightly axe-like 3rd antennal segments and the yellowish anterior margin of the frons are typical characters. It is an abundant fly with preference for open forest biotopes, the larvae are phytosaprophagous.