REVIEW OF THE WASPS OF THE SUBFAMILY PSENINAE 

 OF NORTH AMERICA (HYMENOPTERA : ACULEATA) 



By J. R. Malloch 



Biologist, Bureau of Biological Survey, United States Department of Agriculture 



INTRODUCTION 



This paper is the result of some work done several years ago and 

 brought up to date now in order to make available to entomologists 

 the data accumulated in working over the collections in the United 

 States National Museum and the Bureau of Biological Survey. 

 Originally started as a joint undertaking with S. A. Rohwer, of the 

 Bureau of Entomology, the matter is presented by the author alone 

 because press of work on other subjects compelled his collaborator to 

 give up the project after making an examination of the Fox and 

 Cresson types in Philadelphia in 1926. The author regrets that 

 this action was forced upon his colleague and accepts the full respon- 

 sibility for the matter presented herein. 



All material except four specimens of a few of the more common 

 species, retained in the collection of the Bureau of Biological Survey 

 for purposes of comparative work in connection with the examina- 

 tion of stomach contents of birds and mammals by the Division of 

 Food Habits Research, will be found in the collection of the United 

 States National Museum, and all type specimens of new species 

 except one are deposited in that institution. 



TAXONOMIC TREATMENT 



The group is herein accepted as a subfamily of the family Psen- 

 idae, Pemphredoninae being the other subfamily of that family. 



There has been considerable confusion in the North American 

 literature regarding the application of the generic names in Psen- 

 inae, and also in determining the limits of the genera. It is with 

 the purpose of clearing up the status and relations of these and their 

 species that this paper is published. A careful examination has 

 been made of the genotypes, and the decisions as to the validity 

 of the various genera are based upon these examinations. The type 

 specimens of most of the species described b}^ Cresson, Fox, Packard, 

 and Viereck have been examined to determine their status, and every 



No. 2967. — Proceedings U.S. National Museum, Vol. 82. Art. 26 



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