This is the first complete list of Hymenoptera species belonging to the family Bethylidae that parasitise beetle species belonging to the family Dermestidae. New records are presented for Laelius anthrenivorus Trani, 1909, a parasite of Anthrenus verbasci (Linnaeus, 1767), Laelius pedatus (Say, 1836), a parasite of Trogoderma glabrum (Herbst, 1783), both of which are from the Czech Republic and Holepyris sylvandis (Brethes, 1913), a parasite of Trogoderma angustum (Solier, 1849) from Slovakia.