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Platycampus luridiventris is found throughout Europe, and was recorded from China (Szechuan) and Japan by Benson (1963). The recorded hosts are Alnus incana Willd., A. ghitinosa Gaertn. and A. rotundifolia Mill. Obarski (1934) and Hsin (1935) gave some biological notes on the species; Maxwell (1955) described the internal larval anatomy; and Lorenz and Kraus (1957) described the larva and stated that the species sometimes feeds on Betula, Corylus, and Rubus idaeus. The larva is most unusual for a sawfly, the body being flattened with each segment extended laterally as lobes, and the head, in frontal view, concave on the dorsum.