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Thanks to Sergiy and Theo for looking at my Tabanidae.
This one was big and I can se in a Swedish key (only females) that both tropica and nitidifron could be up to 18 mm.

If I search at Swedish "Artportalen" tropica is found in Southern part of Sweden but nitidifrons of found in my part of Sweden an in second half om May and first part of June.

Kurt Holmqvist