Pasożytnicze błonkówki [Hymenoptera - Parasitica] stowarzyszone z mszycami - Aphidodea [Homoptera] w zaroślach śródpolnych

The guilds of primary parasitoids (Ichneumonoidea: Aphidiidae, Chalcidoidea: Aphelinidae) as well as hyperparasitoids (Chalcidoidea: Pteromalidae, Encyrtidae, Eulophidae; Cynipoidea: Charipidae: Alloxystinae, Ceraphronoidea: Megaspilidae) of the two aphid species (Homoptera: Aphididae): Aphis fabae SCOP. on spindle tree and Aphis sambuci L. on common elder in midfield thickets are presented. A role of the midfield thickets, especially of the habitat and the aphid host plants as reservoirs of the parasitoids is discussed.