GALL
axillary bud changed into a egg-shaped gall with a remarkably long tapering tip; the gall measures up to one cm, and mostly (?) is long, patently hairy. The gall chamber is lined with mycelium. Larva solitary, pupates in the gall.

HOST PLANTS
Fabaceae, narrowly monophagous

Cytisus scoparius.

- Willem N. Ellis: (2021) Plant Parasites of Europe^©

Reference: https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/diptera/nematocera/cecidomyiidae/cecidomyiinae/cecidomyiidi/asphondyliini/asphondyliina/asphondylia/asphondylia-pilosa/