FAUNAL COMPOSITION, WING POLYMORPHISM AND SEASONAL ABUNDANCE OF SOME FLEA BEETLES (COLEOPTERA, CHRYSOMELIDAE) IN SOUTHERN QUEBEC (CANADA)

Chrysomelidae (51 taxa) were collected with flight intercept traps fro m May through October during 1987-1989, in four sites near a raspberry plantation in southern Quebec. More species and individuals of phytop hagous flea beetles occurred in two open sites than at a pine woods-ra spberry field boundary and in a pine woods. Longitarsus luridus comple x, an immigrant taxon in North America, represented 58% of all capture s in the two open sites where both Ranunculus acris and Plantago spp. are its main host plants; this species and Longitarsus rubiginosus wer e almost exclusively represented by jumping apterous adults in pans of flight intercept traps. The seven most abundant chrysomelid species f rom Johnville are probably all univoltine, and they are apparently not serious raspberry pests. Three life cycle types are apparent: L. luri dus complex oviposit in autumn and overwinter as adults. Capraita subv ittata, Chaetocnema minuta, Epitrix cucumeris, Phyllotreta striolata a nd Tricholochmaea alni also overwinter as adults but oviposition begin s in spring. Longitarsus rubiginosus oviposits in autumn, overwinterin g in the egg and/or larval stage.