The first field survey, noting the occurrence and diversity of filth fly pupal parasite fauna in Hungary, was done on beef and dairy feedlots, and swine and poultry farms in the northern and central parts of the country.Musca domesticaL. andStomoxys calcitrans(L.) were the two major filth fly hosts. Four species ofSpalangiarecovered, in decreasing order of abundance, wereS. cameroniPerkins,S. endiusWalker,S. nigroaeneaCurtis, andS. nigraLatrielle.S. endius, Muscidifurax raptorGirault&Sanders, two apparently undescribedTrichopriaspp. and one apparently undescribedCopterasp. are believed to be new country records.