3 o 4 R. W. CROSSKEY 



ACKNOWLEDGEMENTS 



This work would not have been possible without the generous cooperation that 

 I have had over many years from specialist friends and from the custodians of types 

 and other material in European, Asian, Australian and North American collections. 

 To all who have helped me with information, type loans, facilities at other museums, 

 or in other ways I extend my thanks. 



I owe a special debt of gratitude to Dr Louis Mesnil (lately of the Commonwealth 

 Institute of Biological Control, Switzerland), not only for allowing me full use of 

 his collection during visits to Delemont and lending me types, but also for giving 

 me the benefit of his opinion on innumerable taxonomic points: I have profited 

 greatly from his vast experience, and take this opportunity of expressing my appre- 

 ciation. 



I am grateful also to other specialists on Tachinidae who have helped me in many 

 ways, namely Dr Benno Herting (Staatliches Museum fur Naturkunde, Ludwigsburg) , 

 Dr Curtis Sabrosky (U.S.D.A./U.S.N.M., Washington D.C.), and Dr Monty Wood 

 (Biosystematics Research Institute, Ottawa) who responded with unfailing prompt- 

 ness to my many requests for information or an opinion. 



For the loan of types or other material I warmly thank the following, in addition 

 to those named above: Dr D. H. Colless (Division of Entomology, C.S.I.R.O., 

 Canberra); Dr Willem Ellis (Zoologisch Museum, Amsterdam); Dr W. Hackman 

 and Dr B. Lindeberg (Zoological Museum, Helsinki); Dr P. J. van Helsdingen 

 (Rijksmuseum van Natuurlijke Historie, Leiden); Dr. A Kaltenbach and Dr R. 

 Lichtenberg (Naturhistorisches Museum, Vienna); Dr L. Lyneborg and Dr S. L. 

 Tuxen (Universitetets Zoologiske Museum, Copenhagen); Monsieur L. Matile and 

 Dr L. Tsacas (Museum National d'Histoire Naturelle, Paris) ; Dr G. Morge (Institut 

 fur Pflanzenschutzforschung Kleinmachnof, formerly in part Deutsches Ento- 

 mologisches Institut, Eberswalde) ; Dr Per Inge Persson (Naturhistoriska Riks- 

 museet, Stockholm) ; Dr H. Schumann (Museum fur Naturkunde der Humboldt- 

 Universitat, Berlin); Dr H. Shima (Biological Laboratory, College of General 

 Education, Kyushu University, Fukuoka) ; Dr S. Somadikarta (Museum Zoologicum 

 Bogoriense, Bogor) ; Dr S. Takano (Sapporo, Japan) ; the late Dr J. Verbeke (Konink- 

 lijk Belgisch Instituut voor Natuurwetenschappen, Brussels); and Dr P. Wygodzin- 

 sky (American Museum of Natural History, New York). 



For providing me with information on type-specimens in their charge I thank: 

 Dr H. Andersson (Zoological Institute, Lund); Dr A. Draber-Monko (Institute 

 of Zoology, Polish Academy of Sciences, Warsaw) ; Dr R. Hertel (Staatliches Museum 

 fur Tierkunde, Dresden); Dr A. P. Kapur (Zoological Survey of India, Calcutta); 

 Mr G. L. Muller (Museu de Entomologia, Estacion Esperimental Agricola de la 

 Molina, Lima); and Dr Vera Richter (Zoological Institute, Academy of Sciences, 

 Leningrad). 



The preparation of the host-parasite list involved the checking of a large number 

 of names in various insect orders and I am most grateful to colleagues on the staff 

 of the Department of Entomology, British Museum (Natural History), who assisted 

 me in this. Mr Keith Harris, dipterist of the Commonwealth Institute of Entomol- 

 ogy, provided me with several new host and distribution records arising from his 



