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The latter species ar known by me exclusively from the samples of Jan Prüffer, professor of Vilnius university, who have collected his material in the Vilnius Region (occupied by Poland), but after world war II have returned to Poland and created department of entomology in the university in Torun. He was actually resercher of Lepidoptera, so his material was reared very probably, while hosts of Stomina tachinoides and Thelymyia saltuum are not known...