D r? *" Australian ichneumonids of the tribes Labenini and Poecilocryptini I. D. Gauld Department of Entomology, British Museum (Natural History), Cromwell Road, London SW7 5BD G. A. Holloway Division of Invertebrate Zoology, Australian Museum, 6-8 College Street, Sydney, New South Wales, Australia Contents Synopsis 107 Introduction : 107 Material examined 108 Checklist of Australian Labenini and Poecilocryptini 108 Subfamily Labeninae 109 Key to tribes of Labeninae 110 Tribe Labenini 110 Key to genera of Labenini occurring in Australia Ill Labena Cresson Ill Key to species of Labena occurring in Australia 112 Certonotus Kriechbaumer 117 Key to species of Certonotus occurring in Australia 119 Tribe Poecilocryptini 137 Key to genera of Poecilocryptini 138 Alaothrys Gauld 138 Poecilocryptus Cameron 139 Key to species of Poecilocryptus 139 Urancyla Gauld 141 Acknowledgements 142 References 142 Index to hosts 149 Index to Ichneumonidae 149 Synopsis The Australian species of the labenine tribes Labenini and Poecilocryptini are revised and keys provided to the five genera and 36 species occurring on the continent. Twenty new species are described, but one is not formally named as its status requires further investigation. The remaining 16 species are redescribed and their diagnostic features emphasized. Asperellus Townes is newly placed as a junior synonym of Certonotus Kriechbaumer, Certonotus tasmaniensis Turner is treated as a junior synonym of C. nitidulus Morley and Poecilocryptus straminea Morley placed as a junior synonym of P. nigromaculatus Cameron. Lectotypes are designated for five species. Details of known hosts are given together with notes about the geographical distribution of each species. A brief introductory section discusses the systematic position of the subfamily and outlines possible relationships between species. A checklist of Australian species, and indexes to hosts and parasitoids complete the work. Introduction Amongst the most important of the natural enemies of insect pests are the parasitic Hymenop-tera, a very large group of animals whose larvae develop at the expense of other insects (Askew, 1971). Under normal circumstances, the populations of many injurious insects are severely Bull. Br. Mus. nat. Hist. (Ent.) 53 (2): 107-149 Issued 30 October 1986
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