This is the fourth 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 on loan from the International Institute of Entomology (IIE; now part of CABI Bioscience).

I have enjoyed the support of a part-time research assistant, Maia Vaswani, generously funded by The Friends of the Natural History Museum. My thanks are due to them and to Maia, who has undertaken a considerable amount of literature research, dissection, text keyboarding, checking and help with preparation of the figures; she was joined for the finishing touches to the work by her successor, Shayleen James. 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. I am very grateful to my wife, Phillipa, for the production of camera-ready copy for the text and figure legends.

The work would have been impossible without the full access, mentioned above, to the collections and other facilities in The Natural History Museum, London. Material was also examined in, or from, the United States National Museum, Washington, Nationaal Natuurhistorisch Museum, Leiden, the University Museum, Oxford, the H.S. Barlow collection, the Forest Research Centre collection, Sepilok and the FRIM collection, Kepong. I am grateful to the staff of all the above institutions for their assistance, to Dr Wolfram Mey of the Museum für Naturkunde, Berlin, for searching for Herrich-Schäffer types and to Chey Vun Khen and Jurie Intachat of the two Malaysian Institutes and to Scott Miller and colleagues in Papua New Guinea for access to unpublished host records.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 Systematic Account), and from Gaden Robinson’s HOSTS database. Dr Wolfgang Nässig (Senckenberg Museum, Frankfurt) and Dr Christoph Häuser (Staatliches Museum für Naturkunde, Stuttgart) kindly provided photographs of types or other material in their care. Shen-Horn Yen translated into English some Japanese text.

Thanks are also due to Henry Barlow and Ian Kitching for their critical comments on all or part of the text. The work also benefited from interactions at various times with Harish Gaonkar (Fabrician type localities), Nancy Jacobson, Joël Minet and Susan Weller.

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