Horse flies (Diptera: Tabanidae) of the north-eastern parts of the Hercynian mountains and adjacent localities (Czech Republic)

The horse fly fauna of the NE parts of the Hercynicum (36 species of 8 genera, including one ssp. and one recognized form) is relatively diverse, including 65.5 % of the Tabanid species recorded from the Czech Republic. All literature records are referred to, and 136 new localities added. The most interesting finds during our faunistic survey were the nationally scarce Silvius alpinus (Scopoli, 1763), Hybomitra arpadi (Szilády, 1923), H. kaurii Chvála & Lyneborg, 1970 and H. nitidifrons confiformis Chvála & Moucha, 1971; in spite of literature records H. lurida (Fallén, 1817) was not re-found. Atylotus plebejus (Fallén, 1817) and Chrysops rufipes Meigen, 1830 are classified as endangered species in the Czech Republic, and Glaucops hirsutus (Villers, 1789) as vulnerable.