Despite the large number of faunistical research conducted on
the aquatic macroinvertebrates in the catchment area of Lake Balaton, no data
are available on blackfly fauna. Our study presents the first published data on
simuliid species of watercourses of the region. Samplings were carried out
seasonally in 2006 from spring to autumn at 58 localities. Altogether twelve
blackfly taxa were found, among them Simulium ornatum was the most
frequent species. Simulium trifasciatum Curtis, 1839 proved to be new to the
Hungarian fauna. The larvae of this species were often found together with S.
erythrocephalum, S. angustitarse, S. lundstromi, S. costatum, the members of
the S. aureum species-group and S. ornatum
