NEW BOTHROMETOPUS SPECIES FROM POSSESSION-ISLAND, CROZET-ARCHIPELAGO,WITH NOMENCLATURAL AMENDMENTS AND A KEY TO ITS WEEVIL FAUNA (COLEOPTERA, CURCULIONIDAE, BRACHYCERINAE)

Three new species of Curculionidae are described from Possession Islan d and a key to the weevil fauna of the island is provided. The followi ng nomenclatural changes are made, based on an examination of all 36 s pecies in the Ectemnorhinus-group of genera: Neocanonopsis Hoffmann is synonymized with Christensenia Brinck, Antarctonesiotes Jeannel and M esembriorrhinus Jeannel with Bothrometopus Jeannel, and Dusmoecetes Je annel and Xanium Enderlein with Ectemnorhinus G.R. Waterhouse. Christe nsenia dreuxi (Hoffmann) comb, n. is transferred from Neocanopsis, Bot hrometopus crozetensis (Enderlein) comb. n. is transferred from Mesemb riorrhinus and reinstated as a valid species, Bothrometopus desolation is (Jeannel) comb. n. is transferred from Antarctonesiotes, Ectemnorhi nus vanhoeffenianus (Enderlein) comb. n. is transferred from Xanium, a nd Ectemnorhinus possessionensis (Hoffmann) comb. n. is transferred fr om Xanium and removed from synonymy with Ectemnorhinus vanhoeffenianus . The rich diversity of species on Possession Island is briefly compar ed with that of the other South Indian Ocean Province islands.