PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol. 110 Washington : 1959 No. 3419 



A DESCRIPTION AND CLASSIFICATION OF THE FINAL 

 INSTAR LARVAE OF THE ICHNEUMONIDAE (INSECTA, 



HYMENOPTERA) 



By J. R. T. Short ' 



Introduction 



In this paper are given a description and classification of the final 

 instar larvae of the Ichneumonidae based on a study of species repre- 

 senting 151 genera. Keys are given to the subfamilies, tribes, and 

 genera. Characters of the subfamilies and tribes are described verbally, 

 but the description of each genus usually takes the form of a diagram. 

 Any special features are noted in the text, and when a species differs 

 from that figured for a genus the difference is noted. Diagrams were 

 selected as the most concise and accurate method for recording 

 larval characters. 



Material and Acknowledgments 



In work of this nature great care must be taken to insure that only 

 reliably identified material is used. Most of the material on which 

 this study is based comes from the U.S. National Museum, Wash- 

 ington, D.C. I wish to thank the Museum for permission to borrow 

 material and I am most grateful to Miss Luella M. Walkley for her 

 help and advice concerning this work. I am also grateful to Mr. G. 



' Natural History Department, Marischal College, University of Aberdeen, Aberdeen, Scotland, 



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