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I cannot find any genus with abdomen without margin, orange antenas, shiny black frons and pale face, probably without black strip (majority of my pictures are blured). Legs seem to be prevalently pale. Even the pattern on the abdomen is quite new for me.

Slovakia, Banska Bystrica, 400 m.a.s.l., 7 May 2017, hedgerow

thank you in advance

Matej

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one more picture

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Hello Matej. I think maybe Dasysyrphus?

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Helo Karol.

Dasysyrphus was my very first idea, but no species matches. On top of that, Dasysrphus has abdomen marginal ridge.

Now I am speculating about Epistrophella euchroma, but I am not sure.