Ovoid, long-woolly bud gall...Rhopalomyia pilosa Felt
Galls are white and enclose several hard, thin-shelled cavities, each with one larva. The host was only tentatively identified as an Antennaria. R. pilosa is distinct from R. antennariae, a species definitely known from Antennaria...Distr.: Northwest Territories.
”- Raymond J. Gagne: (1989) The plant-feeding gall midges of North America©