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Widespread under trees, 4mm.
It is not Tephritidae, neither Pallopteridae I think.

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Could well be Sciomyzidae. A lateral shot might help.

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Lateral image, I hope same-same fly.

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Hi Nikita and Paul,

I don't want to say Sciomyzidae is impossible, but the convergent post-vertical bristles don't point to that family.

Jan Willem

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Are we really really sure that's it's no Tephritidae ?
It really does NOT look like Sciomyzidae.

Theo Zeegers

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Vein Sc link to C on angle far less than 90, it is my reason why not Tephritidae.

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And are there many Tephritidae with a long plumose arista?

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My guess is Lauxaniidae, near Homoneura. There are several lauxaniid genera with dotted wings in the eatern Palearctic and no doubt also some in the Oriental region.

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Dear all,

The bristles on the legs and abdomen are far too large for a Tephritid! As is the colour of the eyes.
So I'd rather go with Lauxanidae.

John

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Thank you all.

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Hi Nikita,

Here http://xespok.net...auxaniidae

you'll find a very similar fly which is one of the easily identifiable Lauxaniid flies of Japan. It is supposed to be Homoneura euaresta. Whehter it is the same species or a closely related one is difficult to say. The wing pattern is somewhat variable.

Xespok

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Thank you Xespok. I have Shatalkin's key to Palearctic Lauxaniidae. According this key it is Homoneura, but not H.euaresta. Also according it Oriental region is center of Homoneurinae diversity. As illustration of this fact I can add another one Thai Homoneurinae.
Fly is collected, may be Shatalkin himself know it till species.

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According Shatalkin's guide for Palearctic Lauxaniidae there are 3 species with such a painted wings: H. euaresta - Japan-Korea-Russia Far East, H. picta - widespread China-Oriental, H. trypetoptera - widespread Oriental, possibly South China.
H. trypetoptera - arista with hair as long or more than 3-d segm antenae wide (rest two Homoneura - arista hair 1/3 as long...).
H. trypetoptera - femora yellow with narrow brown ring in apical part.

So I think it is Homoneura trypetoptera.

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Finally confirmed by Anatoliy Shatalkin as Homoneura trypetoptera