The zoogeographical distribution of horse-flies (Tabanidae, Diptera) in Czechoslovakia (Part I)

In this first part of a review of the geographical distribution of Tabanidae, 61 species and subspecies are listed, distributed between 10 genera, as follows: Chrysops (8), Silvius (1), Hybomitra (18), Atylotus (5), Therioplectes (1), Tabanus (17), Glaucops (1), Heptatoma (1), Haematopota (7) and Philipomyia (2). The number of localities in which each species occurs is shown, together with percentage representation in the steppe, forest and mountain zones of the latter. The months in which adults of each species are active are shown in a list, and the species are classified as dominant, subdominant or of low population density on the basis of their occurrence on grazing cattle in Slovakia. The dominant species are Tabanus bromius L., Haematopota subcylindrica Pand. and H. pluvialis (L.). Maps are given showing the distribution in Czechoslovakia of 26 species of tabanids.