Ichneumon-Flies of America North of 



Mexico 



Henry and Marjorie Townes 



Introduction 



This is part 3 of a series of monographs on the ichneumon flies 

 of America north of Mexico, prepared under a project supported by 

 the Dow Chemical Company, The University of Michigan, and the 

 National Science Foundation, The first part, on the Metopiinae, 

 was issued March 6, 1959, as U.S. National Museum Bulletin 216, 

 part 1 . The second part, on the Ephialtinae, Xoridinae, and Acaeni- 

 tinae, was issued June 24, 1960, as part 2 of that Bulletin. 



The statements in parts 1 and 2 about bibliography, terminology, 

 and material studied apply also to this paper. References to original 

 descriptions concerning Nearctic specimens are all given, and refer- 

 ences to original descriptions based on exotic specimens are given 

 where they seem necessary to explain the nomenclature. Papers on 

 biology and morphology are cited, but those which record only hosts 

 or localities, or which are secondary taxonomic references, are omitted. 

 If these are of interest, however, they can be located m a recent 

 catalog (Townes, 1945, Mem. Amer. Ent. Soc, No. 11, pp. 249-297). 



Terminology of taxonomic structures is explained in part 1 (pp. 

 vii-ix) of this bulletin. This corresponds in the main with the ter- 

 minology given by Smith and Shenefelt (1956, Trans. Wisconsin 

 Acad. Sci., Arts, Lett., vol. 44, pp. 168, 200-219). Termmology 

 of the ovipositor tip is explained in part 2 (fig. 329, i) of this bulletin. 



The locality and host records we cite are only from specimens 

 seen by ourselves, except in the case of Acroricnus stylator, where 

 records from Mitchell's recent revision are added to the maps. All 

 other unconfirmed reports are omitted. In most cases, however, we 

 have restudied the specimens on which published records are based. 

 If a published locality or host record is not repeated among our data, 

 it has not been confirmed. For names of the hosts, we have had to 

 accept the statements on the pin labels, which in some cases are prob- 

 ably incorrect. We take responsibility for determinations of the 



