A REVISION OF THE NORTH AMERICAN ICHNEUMON-FLIES, BELONGING TO THE SUBFAMILIES NEONEURI-NAE AND MICROGASTERINAE. By C. F, W. MUESEBECK, Of the Bureau of Entomology, United States Department of Agriculture. INTRODUCTION. This paper is a contribution from the Gipsy Moth and Brown-tail Moth Branch of the Bureau of Entomology. It includes tables of the known genera of the braconid subfamilies, Neoneurinae and Mlcro-gasterinae, keys to the North American species, descriptions of new species, and synonymical notes, also figures of the fore wing of repre-sentative species of the North American genera known to me. The two subfamilies are incorporated in this paper, for the reason that one or both of the genera, Neoneurus Haliday and Elasmo-soma Ruthe, which constitute the subfamily NeoneuTinae^ have been quite generally placed in the Microgastennae. This despite the recog-nition by most workers in the Braconidae that both genera differ very widely in many important respects from typical Microgasterinae. Foerster ^ mentioned neither Neoneurus nor Elasmosonia., but included in the Microgastennae a new genus, Ecclites., which Ashraead ^ sj'nony-mized with Neoneurus Haliday. In his key to the Microgasterides Marshall^ included Elasmosoma ; Neoneurus, however, he placed in the Agathides. It will be recalled that Marshall regarded these two groups as tribes of his division Areolaires. Ashmead^ was appar-ently the first to recognize the close relationship of Neoneurus and Elasmosoma. In suggesting that the Microgasterinae might be sus-ceptible of tribal division, he indicated that under such an arrange-ment these two genera would fall together. A few years later Szepli-geti * again separated the two, holding Elasmosoma in the Microgas-terinae, because of its incomplete radial cell, and placing Neoneurus in the Agathid'mae, now the Braconlnae. Furthermore he stated^ No. 2436-Proceedings U. S. National Museum. Vol. 6!, Art. 15 1
BioStor
