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General DescriptionApproximately 6 to 14 mm in length, black and yellow body, with eye bare and face yellow. Distinguishing between S. vitripennis and S. ribesii is challenging, however S. ribesii has the bm cell with a small patch devoid of tiny hairs (i.e. not trichose, see A on image) (Gilbert 1986). However, male S. vitripennis are indistinguishable from male S. rectus. Yellow bands on tergites 3 and 4 are complete, curved posteriorly, and cover approximately half of the lateral margins (see B on image). Males: Hind femur is either brown to black, with only the apical one-quarter yellow (Vockeroth 1992).