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 Camptoptera papaveris Foerster, 1856 Material examined. Ta : Janakkala, Turenki, Mäntyniemi (6756:8370), emerged 1–4.i.2007 from Picea abies cones sampled from a fallen dead tree (taken to indoor rearing 17.xii.2006 ; host unknown), V. Vikberg (8 ♂♂ 26 ♀♀ , VVCT ). Distribution. Palaearctic ( Austria , Belgium , Bulgaria , Chi- na, Czech Republic , Denmark , Finland , France , Germany , Greece , Hungary , Italy , Japan , Kyrgyzstan , Netherlands , Poland , Portugal , Romania , Russia , Serbia , Slovakia , Spain , Switzerland , United Kingdom ), Afroropical ( South Africa ), Nearctic ( Mexico , USA ), Neotropical ( Argentina ), and Oriental ( India ) Regions (T*©ංൺඉංඍඌඒඇ 2014b, Aඇඐൺ*© et al. 2020). Cleruchus megatrichus Novicky, 1965 Material examined. FINLAND : N : Nurmijärvi, Simonsberg (6705:3378), 13–18.vii.1992 , window trap in hollow maple, M. Koponen ( 2 ♀♀ , FMNH ). Ta: Janakkala, Turenki, Rotary park (6758:3372), 18.iv.2014 , V.Vikberg ( 1 ♂ , VVCT ).Loppi,Räyskälä (6740:3343),airport, 12.vii.1993 ,V.Vikberg ( 1 ♂ , VVCT ). FRANCE : Vaucluse, Mont Ventoux, vii.1978 , M. W. R. de Vere Graham ( 4 ♀♀ , BMNH ). Distribution. Palaearctic Region ( Poland , Spain ) (T*©ංൺඉංඍ- ඌඒඇ 2014a). New species records for Finland and France . Cleruchus pluteus Enock, 1909 Material examined. Ab : Karjalohja (6685:3323), 19.vi.1992 , M. Koponen ( 1 ♀ , FMNH ). Lohja (6693:3334), 19.vi.1992 , M. Koponen ( 1 ♂ , FMNH ).Parainen, Kuitia (6695:3245), 29.vi.2017 , J. Paukkunen, pan trap ( 1 ♂ , UCRC _ENT 00498737; molecular voucher D5924, J. M. Heraty Laboratory at University of California , Riverside, California , USA ). Kb : Tohmajärvi (6909:3660), 21.vii.1982 , M. Koponen ( 1 ♂ , FMNH ). St : Vammala (6814:3286), 1.vii.1993 , M. Koponen ( 1 ♀ , FMNH ). Distribution. Palaearctic Region ( Belgium , Bulgaria , Canary Islands, Czech Republic , Denmark , Finland , Germany , Greece , Italy , Netherlands , Poland , Romania , United Kingdom ) (T*©ංൺඉංඍඌඒඇ 2014a;Kඈඉඈඇൾඇ & T*©ංൺ- ඉංඍඌඒඇ 2016). Cleruchus taktochno Triapitsyn, 2014 Material examined. N : Nurmijärvi (6704:3380), 28.v.1992 , M. Koponen ( 1 ♂ , FMNH ). Ta : Janakkala, Kalpalinna (6757:8369), 7.vii.2017 , V.Vikberg ( 1 ♂ , VVCT ). Loppi, Räyskälä (6740:3343), airport, 12.vii.1993 , V. Vikberg ( 1 ♂ , VVCT ). Pälkäne (6802:3351), 23.v.1982 , M. Koponen ( 1 ♂ , FMNH ). Sa : Mikkeli [rural municipality], Kivilahdentie 6 (6839:3506), 1.vi.2001 , M. Koponen ( 1 ♂ 1 ♀ , FMNH ). Distribution. Palaearctic Region ( Belgium , Denmark , Poland ) (T*©ංൺඉංඍඌඒඇ 2014a). New species record for Finland . Cosmocomoidea oxypygus (Foerster, 1856) Material examined. N : Helsinki:Kannelmäki (6682:3383), M. Koponen: 10.viii.1980 ( 1 ♀ , FMNH ); 30.viii.1980 ( 3 ♀♀ , FMNH ); 6.ix.1980 ( 1 ♀ , FMNH ); 20.vii.1981 ( 1 ♀ , FMNH ); (labeled as Helsingfors), Mellungsby, 20.viii.1962 ,W.Hellén ( 1 ♀ , FMNH ).Hyvinkää (6714:3372), 25.viii.1992 , swept from forest grasses, M. Koponen ( 2 ♀♀ , FMNH ). Nurmijärvi, Nummimäki (6702:3378), 5.ix.1989 , M. Koponen ( 1 ♀ , FMNH ). Sipoo, Bakunkärr (6688:3400), 30.viii.1983 , M. Koponen ( 1 ♀ , FMNH ). Ta : Janakkala, V.Vikberg: Hangastenmäki (6755:3369), 16.viii.2013 ( 15 ♀♀ , VVCT ); Helvetinvuori (6751:8377), 9.ix.1978 ( 1 ♀ , VVCT ); Kalpalinna, Turistirinne(6760:3369), 15.viii.2013 ( 16 ♀♀ , VVCT ), 17.viii.2013 , swept from Populus tremula ( 23 ♀♀ , VVCT ). Kl : Parikkala, Laurila, forest, 25.vii.1945 , W. Hellén ( 1 ♀ , FMNH ). Tb : Rautalampi (6948:3495), 19.vii.1983 , M. Koponen ( 1 ♀ , FMNH ). Sb : Suonenjoki, Tyyrinmäki (6943:3504), 15.vii.1983 , M. Koponen ( 1 ♀ , FMNH ). Om : Alajärvi (6995:3355),edge of forest road, 18.viii.1982 , M.Koponen ( 1 ♀ , FMNH ). Distribution. Palaearctic ( Belgium , Bulgaria , Germany , Greece , Hungary , Iran , Italy , Netherlands , Romania , Russia , Spain , Turkey , United Kingdom ) and Nearctic ( USA ) Regions (T*©ංൺඉංඍඌඒඇ 2013). New species record for Finland .