ZV-339 003-206 kopie 04-01-2007 14:53 Page 3 A revision of the Old World species of Megischus Brullé, Stephanus Jurine and Pseudomegischus gen. nov., with a key to the genera of the family Stephanidae (Hymenoptera: Stephanoidea) C. van Achterberg Achterberg, C. van. A revision of the Old World species of Megischus Brullé, Stephanus Jurine and Pseudomegischus gen. nov., with a key to the genera of the family Stephanidae (Hymenoptera: Stephanoidea). Zool. Verh. Leiden 339, 27.xii.2002: 3-206, figs 1-683.— ISSN 0024-0672. ISBN 90-73239-83-4. C. van Achterberg, Afdeling Entomologie, Nationaal Natuurhistorisch Museum, Postbus 9517, 2300 RA Leiden, Netherlands (e-mail:
[email protected]). Key words: Hymenoptera; Stephanoidea; Stephanidae; Megischus; Stephanus; Pseudomegischus; Profoe- natopus; Afromegischus; Schlettererius; Foenatopus; Parastephanellus; Hemistephanus; Comnatopus; Cal- lomegischus; Oriental; Australian; Indo-Australian; Afrotropical; Neotropical; Nearctic; Palaearctic; new genus; new species; keys; revision. The genera of the family Stephanidae Leach, 1815 (Hymenoptera: Stephanoidea), are redefined and keyed. Three new genera and two subgenera are described and illustrated. Profoenatus gen. nov. (type species: Stephanus elliotti Ceballos, 1926, from Madagascar), with subgenus Comnatopus nov. (type species: Stephanus comma Morley, 1917, from the African continent), Afromegischus gen. nov. (type species: Stephanus pachylomerus Schletterer, 1889, from the African continent) and Pseudomegischus gen. nov. (type species: Stephanus sulcifrons Schletterer, 1889), with the nominate subgenus in the Indo-Aus- tralian region and subgenus Callomegischus nov. (type species: Stephanus tibiator Schletterer, 1889) in the Afrotropical region with an extension to the Arabian Peninsula. The Indo-Australian and Palaearctic species of the genus Megischus Brullé, 1846, are revised, 25 described species are recognised as valid, 22 new synonyms are established (plus 5 likely ones) and 17 new species are added.