Parasitoids known to attack Saturniidae, and hyperparasitoids reared from Saturniidae, are listed in taxonomic categories; about 350 species of parasitoids are recorded from about 175 species of Saturniidae. These include 105 Ichneumonidae, 21 Braconidae, 3 Trigonalyidae, 115 Tachinidae, 4 Sarcophagidae, 2 Pyralidae, as well as about 100 records for families of Chalcidoidea (Tormyidae, Eurytomidae, Perilampidae, Pteromalidae, Chalcididae, Eupelmidae, Encyrtidae, Eulophidae, Trichogrammatidae) and Proctotrupoidea (Diapriidae, Scelionidae). The worldwide phorid Megaselia scalaris is occasionally reared from pupae of Saturniidae, but is not a true parasitoid. All records are documented with citations to literature or specific records, many previously unpublished. Nomenclature of parasitoids and hosts is updated as far as possible. An index to the hosts refers back to the taxonomic list of parasitoids, so that all known parasitoids for a particular host can readily be found. The catalog includes several new unpublished records of parasitoids in southern Africa supplied by Rolf G. Oberprieler of the Plant Protection Research Institute, Pretoria.