Systematics and Biology of Four Polish Species of Peristenus Foerster (Hymenoptera: Braconidae, Euphorinae) 1

Abstract
A complex of Polish Peristenus Foerster is shown to consist of four species, 3 are parasitic on Lygus rugulipennis Poppius: stygicus n. sp., digoneutis n. sp., and rubricollis (Thomson): and one on Stenodema virens (L.), stenodemae n. sp. The life cycles and host relations of the braconids and their roles in the reduction of mirid populations are reviewed.

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