Contribution to the knowledge of the Auchenorrhyncha fauna of Central Italy (Hemiptera, Fulgoromorpha et Cicadomorpha).

The results of several research trips carried out during the past six years in the Central Italian regions of Lazio and Abruzzo (including only few localities in Umbria), covering a variety of biotopes from coastal up to high mountain sites, are presented: 331 species were found, 3 of them - already published separately - new to science (Kelisia italica Guglielmino & Remane, Rhopalopyx cigigas Guglielmino and Euscelis venitala Remane, Bűckle & Guglielmino), 10 of them apparently not yet recorded from Italy, 11 probably first records from continental Italy, even more (38) seem to be first records for "peninsular" Italy ("S" of D'Urso, 1995). These numbers demonstrate the gaps in previous research as well as the need for further research in order to obtain a reliable basis to recognize the change of species distribution or even species set in future times (results e.g. of global warming, pollution etc.). For all species their distribution - altitude, biotopes etc. - in the examined region is discussed, for some of them in comparison with their geographic distribution in Italy, for some taxa taxonomical or nomenclatural remarks are added. An appendix mentions some taxa (3 of them new for peninsular Italy) collected 1977 in Marche/Umbria (Monti Sibillini) and Abruzzo by the third author