This is the first part of the series I have undertaken as a Scientific Associate of the Natural History Museum, with access to collections, libraries and with working space and facilities provided in the Department of Entomology. I am grateful also for continued use of a microscope and computer equipment on loan from the International Institute of Entomology.

I have enjoyed the support of a part-time assistant, Núria López Mercader, generously funded by The Friends of the Natural History Museum. My thanks are due to them and to Núria, who has undertaken a considerable amount of literature research, translation, dissection, text checking and help with preparation of the figures. Some preliminary work was also done by her predecessor, Mandy Heddle. Much support in seeing the series through to publication in Malaysia continues to be provided by Henry Barlow, who also markets the reprint edition and underwrites the cost of the colour plates. The colour plates were photographed by Bernard D'Abrera and those of early stages by David Agassiz. I am very grateful to my wife, Phillipa, for the long hours she put in at the keyboard to produce camera-ready copy for the text and figure legends.

The work would have been impossible without the full access to the collections mentioned above and other facilities in The Natural History Museum, London. Material was also examined in, or from, the Australian National Insect Collection, Canberra, the Zoologisch Museum, University of Amsterdam, the U.S. National Museum of Natural History, Washington, the B.P. Bishop Museum, Honolulu, the University Museum, Oxford, the Forest Research Centre collection, Sepilok, and the FRIM collection, Kepong. I am grateful to the staff of all these institutions for their assistance, and to Chey Vun Khen and Jurie Intachat of the last two for access to unpublished host records. Such records were also gleaned from data taken from material submitted to IIE over the years for identification (See Sterrhinae). John Rawlins kindly provided me with a translation of host-plant data in Inoue et al. (1982). Paddy Murphy kindly sent voucher material from his mangrove studies for examination. In May 1997 M.C. Herbulot brought Bornean material from his collection to London that enabled useful additions to be made to the text at a late stage. More detailed investigation of some of this material will be reported on in Part 8.

Thanks are also due to the following for their critical comments on all or part of the text: Charles Covell, Tony Galsworthy, Hiroshi Inoue, Malcolm Scoble and Katsumi Yazaki. Frequent discussions with Tony Galsworthy, studying the Sterrhinae and Larentiinae of Hong Kong in parallel, led to resolution of numerous knotty problems of identification and to enhancement of our knowledge of various taxa to the benefit of both our research programmes. The work also benefited from interactions at various times with David Carter, Chey Vun Khen, S.-W. Choi, Hiroshi Inoue, Jurie Intachat, Mark Parsons, Gaden Robinson and Katsumi Yazaki.

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