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I'm idiot. When I see Black's fly it came to my mind that I've seen somewhere illustration of this very fly. And soon I found it in Diptera of Europ. Part of Russia. It was Chetostoma stakelbergi, but the illustration was placed inside key for genus Chaetorellia. One Chaeto-something and another Chaeto-samething. Of course, searching in genus Chaetorellia lead me to nothing. Even size was abnormaly large for all Chaetorellia.
Thank you Kahis. Black may be sure that he is author of unic live photo of Chaetostoma stakelbergi! So does my Rosfoto collection!
Nikita