A REVISION OF THE NOETH AMERICAN SPECIES OF 

 ICHNEOTON-FLIES BELONGING TO THE GENUS 

 APANTELES. 



By C. F. W. MuESEBECK. 



Instructor in E7itovioJogy, Cornell Vnirersity. 



INTRODUCTION. 



The work herewith presented is the result of studies made in the 

 United States National Museum at Washington during the summer 

 of 1919 while the writer was under temporary appointment in the 

 Bureau of Entomology. More or less contributory data had been 

 gathered in the course of a previous appointment in the Bureau of 

 Entomology, at the Gipsy Moth Laboratory, at Melrose Highlands, 

 Massachusetts, and some information had been brought together 

 during the winter and spring of 1918-19 at Cornell University. 

 But it was not until the great mass of valuable material in the col- 

 lection of the United States National Museum had been worked over 

 that an understanding of the North American species of this large 

 and important genus was possible. 



Of the 164 species recognized in this paper 136 are represented in 

 the United States National Museum by type, cotype, or paratype 

 specimens, and only 14 are entirely unrepresented by authentic ma- 

 terial; the holotypes of 119 species are deposited here, including 

 those of 36 new species, which are described in this work. Types of 

 8 of Ashmead's West Indian species are in the British Museum and 

 have not been seen; nor have those of 4 other West Indian species 

 described by Cresson, which are deposited in the Academy of Sci- 

 ences at Philadelphia. The Provancher Collection, in the Museum 

 of Public Instruction at Quebec, Canada, contains the type speci- 

 mens of five North American species of Apanteles, all described by 

 Provancher, which the writer has liad no opportunity of studying. 

 These have been recognized and placed in the key on the basis of the 

 original descriptions and notes made by A. B, Gahan, of the Bureau 

 of Entomology, upon an examination of the type material several 

 years ago. 



Proceedings U. S. National Museum, Vol. 58— No. 2349. 



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