Swollen midrib or lateral vein (318b) . . . . Lasioptera collinsonifolia (Beutenmuller)
Galls are green, tapered and 1-2 cm long. The one to several white larvae in the central tunnel of each gall overwinter in the gall and pupate the following spring. Host: C. canadensis. Distr.: New York and Maryland.
”- Raymond J. Gagne: (1989) The plant-feeding gall midges of North America©