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Thank you Jan and thank Dr. Pont, of course.
By the way, 'most probably Sepsis thoracica' was also reply of Andrey Ozerov, to whom I shortly discribe the fly by mobile phone SMS letter.
Tomorrow I'll try one more mountan place.
Sorry, Jan, but so far no one Opomyzidae, as far as I can see using x5 lens.
Nikita