Bats (Mammalia: Chiroptera) from J.E.HH1, Department of Zoology, British Museum (Natural History), Cromwell Road, SW7 5BD Contents Synopsis . . . . Introduction Systematic section . Megachiroptera . Pteropodidae . Pteropodinae. Harpyionycterinae Nyctimeninae Macroglossinae . Microchiroptera . Emballonuridae Megadermatidae Rhinolophidae . Hipposideridae . Vespertilionidae Vespertilioninae . Miniopterinae Murininae Kerivoulinae . Molossidae Summary .... Acknowledgements . References. Addendum 103 103 104 104 104 104 127 130 132 140 140 142 143 148 153 153 171 190 194 195 198 199 199 208 Synopsis Accessions of Indo-Australian bats to the collections of the British Museum (Natural History) during the past fifteen years are reviewed in detail, with a particular reference to the collections made in Papua New Guinea and Sulawesi by 'Operation Drake'. Numerous species and species groups from the region are examined and in some cases revised; a new species of Hesperoptenus from Sulawesi and a new subspecies of Myotis adversus from the New Hebrides are described. The more important taxonomic studies and notes made in this study and the new range records that it reports are listed in a terminal summary. Introduction A variety of collections of bats from the region bounded by India in the west and the New Hebrides, New Caledonia and Fiji to the east has been received at the British Museum (Natural History) during the years 1967-1982. Some have come from individuals who have obtained small numbers of bats while visiting the region, others from large, organised expeditions that have carried out biological studies, or by donation from workers connected with organisations and institutions in the area. Individually much of this newly accessed material scarcely justified separate publication and record, although often unusual or of taxonomic or faunal interest. Towards the end of this period, however, extensive collections of bats were made in Papua New Guinea and in Sulawesi by Mr Ben Gaskell, an ecologist and collector with 'Operation Bull. Br. A/MS. nat. Hist. (Zool.) 45(3): 103-208 Issued 25 August 1983