Thirteen species of Trichoptera new for the fauna of Serbia were identified during investigation of macrozoobenthos in the watershed of the Southern Morava River in the period from 1998 to 2003 and in the Trešnjica River in 2003 and 2004. The species Rhyacophila torrentium Pictet, 1834; Rhyacophila glareosa McLachlan, 1867; Rhyacophila intermedia McLachlan, 1868; Glossosoma conformis Neboiss, 1834; Micropterna lateralis Stephens, 1874; Oecetis testacea Curtis, 1834; Micrasema longulum McLachlan, 1876; Chimarra marginata Linnaeus 1767; Cyrnus flavidus McLachlan, 1864; Brachycentrus subnubilus Curtis, 1834; Ecclisopteryx madida McLachlan, 1867; Melampophylax mucoreus Hagen, 1861; and Grammotaulius nigropunctatus Retzius, 1783 are new for the ...