Leptophloeus alternans (Erichson) was recorded new to Britain by Tom Harrison, in the previous issue of this journal, on the basis of a single specimen he collected from a dead branch of Scots pine Pinus sylvestris at Wisley Common, Surrey (VC 17, TQ0658), on 29 June 2015 (Harrison, 2016). The specimen was accompanied by a male Pityogenes bidentatus (Herbst) (Curculionidae, Scolytinae) with which it was presumed to be associated. Elsewhere in Europe, L. alternans has been found in the galleries of various bark beetles; Lefkovitch (1959) mentions Polygraphus and Pityogenes, and Vogt (1967) adds Cryphalus. It is presumed to prey on the larvae.
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