A revision of the North American inchneumon-flies, belonging to the subfamilies Neoneurinae and Microgasterinae

Abstract

minute, usually indistinct, tarsal claws; the smooth eyes; the narrow radial cell, the third abscissa of radius being parallel with the outer margin of stigma; the subquadrate second cubital cell; and the very short thickened metacarpus. Bengtsson, in the article cited above, gives a concise summary of the published information regarding the biology and habits of members of this group. It appears to have been conclusively shown that the known species pass the larval period as internal parasites of ants. This unusual habit itself will at once set them apart from the Jicrogasterinae, which are evidently exclusively parasitic on lepidopterous larvae. KEY