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Oops, thank you Tony.
Almost overlooked your reply.
Andrey asked me several times when I stop collected this fly. I replied - I can't stop it, I fall in love with Actocetor.
I have just found the source -
http://apt.allenpress.com/aptonline/?request=get-abstract&issn=0013-8797&volume=104&issue=02&page=0249 and than discovered your reply.
Grate!
Nikita