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Hello!

If this fly at our housewall (northwest Germany) did not measure only 2.5 mm, I would have put it into Anthomyiidae or Muscidae. But with this small size I only know Coenosia agromyzina from here, and that seems to have longer antennae.

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Coenosia agromyzina has the Costa only extenting to apex of vein R 4+5 and this is not the case..
I am more thinking about Anthomyiidae species.
And if....can't say more about it.

Johanna

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Hello, Johanna!



Thank you nevertheless! I have never seen such a small Anthomyiid.

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The costa appears distinctly swollen after Sc. Is that a clue?

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There are such small Anthomids …Egle species.
Some can be almost as small as Agromyzidae.
This species could be indeed one of those very small Egle species.
To be sure, we just need more details….and I don’t think we can use the swollen costa as some characteristics.
I have many small unidentified female Egle species and did not give them a proper look yet, because they are almost impossible to ID, but when I do….I will look if they have indeed all a swollen costa.
I personally think this is a fresh emerged species with the wings not fully dried up, as a result of white pale veins what can imply a swollen look.

Johanna

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Many thanks, Johanna! I never was aware of Anthomyiidae species much below 4 mm. This weekend up to 22 °C are prognosed, so I hope I can get more - and better - photos of flies... B)