Note BD — NOTICE OF INSECTS WHICH HAVE BEEN ERRONEOUSLY REFERRED IN RECENT TIMES TO BUTTERFLIES.

These veins have been given a distinct name (discoidal) by the English Entomologists, as if they hail an independent origin, and had nothing to do with the subcostal nervure; but by the use of this name, we wholly lose sight of the simple plan of neuration belonging to the wings of these insects. I have therefore preferred to speak of them as the inferior subcostal nervules, in contradistinction to the superior branches of the same vein.