Taxonomy, annotated new records and a checklist of Mymaridae (Hymenoptera) of Finland, with description of a new species of Eustochus Author Triapitsyn, Serguei V. Entomology Research Museum, Department of Entomology, University of California, Riverside, California, 92521, USA; Author Koponen, Martti Tuoppitie Author Vikberg, Veli Liinalammintie 11 as. Author Várkonyi, Gergely Finnish Environment Institute SYKE, Biodiversity Centre, FI- 88900, Kuhmo, Finland; e-mail: gergely. varkonyi @ ymparisto. fi text Acta Entomologica Musei Nationalis Pragae 2020 2020-11-06 60 2 565 589 http://dx.doi.org/10.37520/aemnp.2020.39 journal article 10.37520/aemnp.2020.39 1804-6487 5177724 659934F0-6B73-4571-8ADA-5E14CD3669EC Polynema ( Doriclytus ) vitripenne ( Foerster, 1847 ) = Polynema depressicollis Hellén, 1974: 20 , syn. nov. Material examined. N : Espoo (6683:3370), 4.x.1982 , M. Pulkkinen ( 1 ♀ , FMNH ). Ta : Janakkala, Vapari (6758:3371), 15.x.2011 , V. Vikberg ( 1 ♀ , VVCT ). Remarks. Polynema depressicollis is here synonymized with P. ( Doriclytus ) vitripenne ( Foerster, 1847 ) . Unfortunately, all specimens (of both sexes, unspecified in the original description other than by their localities) of the type series of P. depressicollis , including its holotype from Parikkala, are lost from FMNH. However, its original description (of the female sex) fits perfectly the redescription of that of P. ( Doriclytus ) vitripenne by T*©ංൺඉංඍඌඒඇ & FංൽൺඅǤඈ (2006), so there is no doubt about its identity, and therefore no neotype designation is necessary for P. depressicollis . Furthermore, Hൾඅඅඣඇ (1974) indicated that his P. depressicollis is the same species as the species from Denmark misidentified as P. euhariforme Haliday, 1833 by Bൺκκൾඇൽඈ*©ൿ (1934), who illustrated it, and which was shown to be conspecific with P. ( Doriclytus ) vitripenne by T*©ංൺඉංඍඌඒඇ & FංൽൺඅǤඈ (2006) based on O. Bakkendorf’s voucher specimens. Distribution. Palaearctic Region ( Belgium , Czech Republic , Denmark , Germany , Russia , Sweden , United Kingdom ) (T*©ංൺඉංඍඌඒඇ & FංൽൺඅǤඈ 2006; Nඈඒൾඌ 2019; Sൺආκඈඏග et al. 2020). New species record for Finland .