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Does anybody have any idea on this one? Caught on 13th August this year on the shingly margins of a freshwater lake.

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A view of the abdomen

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99% Lispe litorea, but to be 100% sure, I'd prefer to see close-up of head (anterior view) and/or mid leg.

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Close up of head.

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Lispe litorea

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Thanks very much Nikita. Looking at the RES guide and the Muscidae of Central Europe, both mention a brown spot near the insertion of the antennae (I presume that is why you wanted to look at a frontal view of the head). Could you mark it on the last image so I know what I am looking for next time!

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These spots are shifting depending on angle of view.
Shape of frontal triangle also important - in your case narrow (excl. - caesia)

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Brilliant, thanks Nikita. My main worry was L. loewi, males of which I have certainly had (no vibrissae, long, curved hair on mid-metatarsus). I have had some females which I have tentatively marked as loewi also, and now I know what I am supposed to be looking for I can go back and check.

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Out of curiosity, what was the feature you were looking for on the mid-leg?

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Mid tibia with 1 ad seta. loewi Ringd.
Mid tibia with 2 or more ad setae. litorea Fallén

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Thanks for the info, very useful to know

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I'm sorry ffor my misID. Now I dived deeper in this group.
It is Lispe loewi, as you correctly suggested yourself.

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Thanks very much for coming back to this one Nikita, as it makes sense of the fact that all my males from here were loewi and all the females litorea! Which features make you go for L. loewi?

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Abdominal spots and absence of black spots near antennae.

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Thanks Niita. Just out of interest, do you have any images of litorea showing the facial spots?