Review of the genus Plutothrix Foerster, 1856 (Hymenoptera, Pteromalidae) with a key to Palaearctic species Author Tselikh, Ekaterina V. https://orcid.org/0000-0002-9184-043X Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia tselikhk@gmail.com Author Varkonyi, Gergely https://orcid.org/0000-0002-7977-2753 Finnish Environment Institute, Biodiversity Centre, Lentiirantie 342 B, FI- 88900 Kuhmo, Finland gergely.varkonyi@ymparisto.fi Author Dale-Skey, Natalie https://orcid.org/0000-0001-7582-0386 Natural History Museum, London, UK n.dale-skey@nhm.ac.uk text Journal of Hymenoptera Research 2022 2022-10-31 93 1 32 http://dx.doi.org/10.3897/jhr.93.86238 journal article http://dx.doi.org/10.3897/jhr.93.86238 1314-2607-93-1 42FFC606F2104BAAADF5A9197F4B970B F3DD81DA3BF154D3B803E87DAA4FA018 Plutothrix acuminata (Thomson, 1878) Figs 1-4 Trigonoderus acuminatus Thomson, 1878: 13. Lectotype female (LUZN, not examined) designated by Kerrich and Graham 1957 : 297. Plutothrix cisae Hedqvist, 1966: 194. Holotype female missing ( Forshage et al. 2016 ). Synonymy by Graham (1993 : 117). Material examined. Paratype female (ZMUH): "Suomi [ Finland ], EH, Luopioinen , 7.8.1963 , E. Kangas ", " Paratypus Plutothrix cisae Hedqvist, 1966" . Other material : Finland (in ZMUH): 1 female , Ta [biogeographical province Tavastia australis], Aitolahti , 22.VII.1932 , coll. V. Saarinen , Plutothrix acuminata (Thom.) det. Koponen 2009. Russia (all in ZISP): Belgorod Prov . , 1 female , 1 male , 10 km S Novy Oskol City , 50°40.683'N , 37°48.551'E , 15.VIII.2020 , coll. S. Belokobylskij and O. Kosheleva. Distribution. Belgium, Canada, Croatia, Czech Republic, Finland, France, Hungary, Netherlands, Russia (European part), Slovakia, Spain, Sweden, United Kingdom ( Noyes 2019 ; Tselikh 2019 ). Biology. Primary parasitoid of Cis boleti (Scopoli, 1763) ( Coleoptera , Ciidae ) in tree fungus Graham (1969) , and Platypeza sp. ( Diptera , Platypezidae ) ( Heydon 1997 ).