Tabanidae (Diptera) community in a very little exploited northern boreal forest at Hoylandet, North Trondelag, Norway

Tabanidae from four Malaise traps run in a mixed northern boreal forest (spruce, birch and alder), located at Hoylandet, N. Trondelag (64 degree 39’N, 12 degree 10’E). showed Hybomitra auripila (Meigen) and Haematopota pluvialis (L.) to be abundant. In total 13 species were recorded, referring to gen. Hybomitra, Haematopota, Chrysops and Heptatoma. No Tabanus or Atylotus spp. were caught. The presence and absence of species are discussed in relation to zoogeography and presence/absence of host animals. The Hybomitra, Chrysops and Heptatoma spp. flew earlier than Haematopota pluvialis. The flight period of Tabanidae was late June to early August, and they were most abundant in late July. (Other species recorded were: Hybomitra lurida, H. tarandina, H. lundbecki, H. montana, H. borealis, H. kaurii, H. bimaculata, H. arpadi, Heptatoma pelluscens, Chrysops relictus and C. nigripes.)