Contribution to the mayfly, aquatic and semiaquatic bug, aquatic beetle, caddisfly and chironomid fauna of the River Tisza and its main inflows (Ephemeroptera, Heteroptera: Nepomorpha and Gerromorpha, Coleoptera: Hydradephaga and Hydrophiloidea, Trichoptera, Diptera: Chironomidae).

Contribution to the mayfly, aquatic and semiaquatic bug, aquatic beetle, caddisfly and chiro- nomid fauna of the River Tisza and its main inflows (Ephemeroptera, Heteroptera: Nepomorpha and Gerromorpha, Coleoptera: Hydradephaga and Hydrophiloidea, Trichoptera, Diptera: Chironomidae).). Localities and collecting data of 25 mayfly, 20 aquatic and semiaquatic bug, 49 aquatic beetle, 15 caddisfly and 55 chironomid taxa are given from 26 collecting sites of the River Tisza and its main inflows. The Helophorus arvernicus Mulsant, 1846 (Coleoptera: Helophoridae) is new to the Hungarian fauna.