The genus Platyceraphron Kieffer, 1906 with the species P. muscidarum Kieffer, 1906 is reported as new to Norway, caught in traps at two different locations. An old Swedish record which seems to have been forgotten is reviewed and one recent Swedish record added. No records are known from Finland and Denmark. Platyceraphron are remarkably dorsoventrally flattened wasps, and have been reported as parasitoids of subcorticeous flies, mainly Lonchaeidae.