Presentation of such a detailed account of these Bornean noctuid subfamiies would not have been possible without the help of numerous organisations and individuals. My deepest thanks are due to all of them.

The extensive freshly collected material available arose partly through the activities of the author under the auspices of the Royal Geographical Society - Sarawak Government Expedition and Survey of the Gunung Mulu National Park (1977-8), whilst financed by a Government Grant-in-Aid for Scientific Investigations administered by the Royal Society, and on a previous expedition (1965) to G. Kinabalu. Another large part of this material was accumulated and prepared by Lt. Col. M.G. Allen and Mr T.W. Harman during a series of expeditions in Brunei.

The taxonomic work was undertaken at the British Museum (Natural History) with the permission of the Trustees and with the assistance and support of the Department of Entomology, particularly the Macrolepidoptera Section. The Museum Photographic Unit prepared the colour plates. I am particularly grateful to Dr I.J. Kitching for frequent discussions on problems of noctuid higher classification.

Type material of several species was examined on loan through the kindness of Dr R. de Jong (Rijksmuseum van Natuurlijke Historie, Leiden), Dr G. Luquet (Museum National d'Histoire Naturelle, Paris) and Dr M.J. Scoble (University Museum, Oxford). I am grateful for the hospitality and help of Dr E.S. Nielsen and Mr E.D. Edwards whilst visiting and working on the Australian National Insect Collection, Canberra.

Mr C.J. Hamilton, Librarian of CIE, kindly made a search of the CAB database for recent literature on species of economic importance.

I am grateful to Prof. Dr L.W.R. Kobes for access to the Sumatran material collected by Dr E.W. Diehl and others, the basis of the Heterocera Sumatrana project, which enabled additions to be made to the known distributions of several species. Similar information for Peninsular Malaysia was gained by examining the collection of Mr H.S. Barlow whilst the author was in Kuala Lumpur.

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