Fusiform stem gall, A. incarnata, summer. Fig. 285
Milkweed stem midge, Neolasioptera asclepiae Felt

Gall. This species was reared from an elongate fusiform swelling on the stem of Asclepias incarnata. It occurs invariably at the joint and on that account presents a symmetrical appearance, which at first sight appears normal. The galls usually contain two larvae, one on each side of the septum of the joint.

tapered node swelling...Neolasioptera asclepiae Felt

Swellings usually include two larvae, one on each side of the septum of the joint. Larvae overwinter in the gall; adults emerge in spring. Host: A. incarnata. Distr.: New York.