Taxonomic notes on the species of Achrysocharoides Girault occurring in Sweden are presented. A. cruentus n.sp. is described from female material only and ♂ ♀A. buekkensis (Erdös) is redescribed. The other species are compared to British material which has been dealt with in two recent papers (Askew & Ruse 1974; Bryan 1980). The keys of these works are supplemented with A. cruentus and A. buekkensis. Lectotypes are designated for Derostenus chrysostomus Thomson and D. niveipes Thomson. Eleven species are reported from Sweden, 9 of which are new to the country. From Hungary 14 species so far are recorded: A. acerianus (Askew), A. butus (Walker) and A. splendens (Delucchi) are reported for the first time. Host and host-plants are presented for each species. Two new hosts are reported for A. splendens: Parornix avellanella on Corylus avellana and Lithocolletis schreberella on Ulmus.