A REVISION OF THE TRIBUS BLACINI (HYMENOPTERA, BRACONIDAE, HELCONINAE) C. VAN ACHTERBERG Rijksmuseum van Natuurlijke Historie, Leiden, The Netherlands Abstract The tribus Blacini ( Braconidae, Helconinae) is revised with special reference to the non-Palaearctic species. The tribus is almost cosmopolitan and embraces the genera Blacus Nees, Blacozona gen. nov. from Argentina, from Chile Stegnocella gen. nov. and Apoblacus gen. nov., and Artocrus gen. nov. from Brazil. For the first time a subgeneric division of Blacus is given; five new subgenera are proposed. All species of Blacus are keyed, 34 new species are described and fully illustrated. The phylogenetic relationships between the subgenera are discussed. A redescription of Mirax cremasto-bombyciae (Fullaway, 1956) comb, nov., is added. Contents Introduction 160 Terminology 160 Distribution 166 Fossil species 169 Phylogeny 169 Biology 172 Key to the tribus of the Helconinae 173 Tribus Blacini 174 Key to genera and subgenera of the Blacini 174 Genus Blacozona nov 176 Genus Stegnocella nov 177 Genus Blacus Nees 179 Subgenus Mesoxiphium nov 179 Subgenus Leioblacus nov 180 Subgenus Ischnotron nov 183 Subgenus Tarpheion nov. 185 Subgenus Contochorus nov 195 Subgenus Ganychorus Haliday 196 Subgenus Hysterobolus Viereck 215 Subgenus Blacus Nees 221 Subgenus Neoblacus Ashmead 243 Genus Apoblacus nov 245 Genus Artocrus nov 247 Excluded species 248 Species inquirendae 250 Acknowledgements 251 Literature 252 Index of names used in the Blacini 320 159
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