A new species of Cleruchus (Hymenoptera, Mymaridae), an egg parasitoid of the invasive Cis chinensis (Coleoptera, Ciidae) in Switzerland, with new records of other congeners in Europe Author Triapitsyn, Serguei V. Department of Entomology, University of California, Riverside, California, 92521, USA serguei@ucr.edu Author Coray, Armin Naturhistorisches Museum Basel, Augustinergasse 2, Basel, 4001, Switzerland Author Rugman-Jones, Paul F. Department of Entomology, University of California, Riverside, California, 92521, USA text Alpine Entomology 2022 2022-11-18 6 97 109 http://dx.doi.org/10.3897/alpento.6.86806 journal article http://dx.doi.org/10.3897/alpento.6.86806 2535-0889-6-97 790BEA609D12465EA11D7D8E6DE844E5 5788F0ACEC0750AD82CB994B65C4B284 Cleruchus megatrichus Novicky, 1965 Cleruchus megatrichus Novicky, 1965: 59-60 (in key). Type locality (of the lectotype designated by Triapitsyn et al. 2013 : 10): forest at Mienia, Minsk Mazowiecki, Minsk County, Masovian Voivodeship, Poland. Cleruchus megatrichus Novicky: Triapitsyn et al. 2013 : 10-12 (information on type series, redescription, illustrations, distribution); Triapitsyn 2014 : 7-8 (key), 20-22 (taxonomic history, distribution, diagnosis, illustrations). Material examined. Spain , Valencia , Valencia , 25.vi.2021 , citrus orchard [1 macropterous female, MCAN] . Distribution. Finland, France ( Triapitsyn et al. 2020 ), Poland ( Novicky 1965 ), Spain ( Triapitsyn 2014 ). Hosts. Unknown.