Margins of newly expanded leaves are tightly curled from beneath. Contarinia larvae were taken in New York in June, Dasineura larvae in Maryland in early May. Larvae of both species are white. At least the Dasineura sp. is gregarious. Host: R. toxicodendron.

[note: It is not clear what "R. toxicodendron" refers to here. It is not an accepted name in the plant taxonomy source cited by Gagné elsewhere in his book (National List of Scientific Plant Names, USDA-SCS, 1982). Current taxonomic authorities (e.g. Weakley (2023), POWO) list it as a synonym for Toxicodendron pubescens, but that is a southern plant not known to occur spontaneously in New York, and would be at the very northern extreme of its range in Maryland. Because Gagné has used the name "R. toxicodendron" for common poison-ivy (T. radicans) before, we assume that he meant that here as well, but include T. pubescens as a host just in case.]

- Raymond J. Gagne: (1989) The plant-feeding gall midges of North America^©