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Thanks once again! At least I was right when I found mixed characters for the two species. All the pictures above have been taken using a flash, so I just took some new photos in neutral daylight. The mesopleuron does not look very shiny to me, but I do not have any experience so I would be happy to hear what you say. I have also read that the hind tarsi should have the three inner segments yellow in female florum, whereas they should be black in meigeniana - any comments on that character? On my fly the hind tarsi are completely black.