[Phlebotomus (Paraphlebotomus) jacusieli Theodor, 1947, a new species of sandflies for the fauna of the USSR].

After examination of sandfly collection from Agdam (Azerbaijan SSR) it was stated that all sandflies previously identified as Phlebotomus mongolensis belong to another species Ph. jacusieli. Ph. jacusieli has not been recorded in the fauna of USSR before. Probably all records of Ph. mongolensis in Transcaucasia are wrong. Description of Ph. jacusieli and some ecological data are given.