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Moscow region, 2,5-3mm, 16 sept

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I'd say Megaselia (Phoridae)

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It's a funny thing flies! Every times after slight idea that I began to understand something in Diptera come to my mind you immidatly show me that I understand nothing. I checked Phoridae in available books, it seems that you are right as usualy. Just in case I add one more image with a little bit visible venation.
Thank you Kahis.

P.S. Can I regard your silence on Ephydridae image as confirmation?

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SInce Megaselia is the largest phorid genus, the chances are in your favout you are right. But did you base your identification on probablility or on visible characters?

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I bit of both. There seems to be no setae on tibiae and a single hair line on hind tibia. While this is by no means unique for Megaselia, other genera with this combination are (in my experience) not commonly found. Also, the male genitalia are partially visible and they match the Megaselia genus group.

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Kahis and Paul, could I ask you to check whether I understand your lesson?
Phoridae?
Moscow city, on the window, 1mm, 27 sept.

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Definitely yes.

Jere

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Thank you Kahis

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I edited thread (change name from Sphaeroceridae to Phoridae), to show it to Mario.
Nikita