Abstract
Data on the composition and distribution of species of the sawfly genus Janus Stephens, 1829 (Hymenoptera: Cephidae) in Russia are clarified. Janus nasutus sp. n. is described from Primorsky Territory. The illustrated description of hitherto unknown male of Janus formosus (Zhelochovtsev, 1935) is given. Janus compressus (Fabricius, 1793) is recorded from Uzbekistan for the first time. A key to all Russian species of the genus Janus with illustrations of both male and female genitalia is provided.
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