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Hi, Chaborus flavicans have distinctive tergal bands and can be identified even without dissection. I do not see these bands in your specimen, these may be hidden by the wings. This is most likely crystallinus or flavicans. Please note that C. albipes is also known to occur in Europe; that species is not uncommon in Finland. Third species of the flavicans complex is posio, hitherto known from Finland only. C. posio is likely a northern species occurring in Fennoscandia and boreal/subarctic taiga in Russia.