INTRODUCTION VII 



We have studied all the types of genotypes, and of Nearctic forms, 

 known to be in existence. 



Where it is of interest, as in the case of types or unusual specimens, 

 the location of particular specimens has been shown in the text by 

 including (in parentheses) an indication of the collection housing them. 

 For private collections the name of the owner has been used as this 

 indication, but for the public collections the name of the city of the 

 institution. The name of the city is thought to be a more convenient 

 and stable designation in such cases than the name of the institution, 

 as institutional names tend to change, and are usually more complex 

 than city names. 



The holotypes belonging to the Townes and Dreisbach collections 

 are being deposited in the U. S. National Museum. 



Localities 



All localities on the pin labels of specimens studied are listed under 

 each species and, except for indefinite localities like a state or other 

 large area, are spotted on the distribution maps. Localities easy to 

 find in atlases or to be found in the LT. S. Postal Guide are listed only 

 by name. The others usually have their counties given. Localities 

 which we could not find are in quotes. Unverified distributional 

 (or host) data in literature are not repeated, as this report is restricted, 

 so far as possible, to first-hand information. 



Bibliography 



Primary references concerning nomenclature of the Nearctic forms 

 have all been given, but except for the occasional references to the 

 biology, the others have been omitted. The omitted references are 

 believed to be of only historical importance, and if the student is 

 interested in them, all those published prior to 1943 may be found in a 

 recent catalog (Townes, 1945, Mem. Amer. Ent. Soc, vol. 11). 



Terminology 



Smith and Shenefelt (1956, Trans. Wisconsin Acad. Sci. Arts, 

 Lett., vol. 44, pp. 168, 200-219) have published diagrams illustrating 

 most of the taxonomic terms commonly used for Ichneumonidae. 

 Their paper will answer most questions on terminology that may arise. 

 Our usage varies from theirs in a few instances as follows: epomia 

 and notaulus are used in place of their "opomia" and "notaulix", as 

 being more generally used terms and more correct from the standpoint 

 of Greek derivation; in regard to notaulus in particular, see Forbes' 

 remarks (1940, Bull. Brooklyn Ent. Soc, vol. 35, pp. 136-137). 



