April Eleventh
The gall-flies, or gall-gnats, cut tiny incisions in the oak leaves and golden-rod stems, and lay their eggs between the tissues. These wounds produce large swellings which furnish the larval insects with food. If broken into at this season, one discovers that the galls on the golden-rod stems are pithy. Embedded in the pith is a white "worm," or a small black capsule, but if the "gall" is empty, a hole will be found where the fly emerged.