The North American Species of the Genus Tiphia (Hymenoptera, Aculeata) in the Collection of the Illinois State Natural History Survey

Abstract

It is not to be assumed that the Tiphia species discussed in this paper constitute an exhaustive list of those occurring in Illinois, and it is certain that a very large number of those occurring in the United
States are unknown to me ; but the present paper contains the most comprehensive survey of the North American species yet attempted, contains many new characters for the differentiation of the species, and should prove useful to students of the group.