Origin: North America
First finding in Slovenia: 2004
Pathways: transported with tree saplings, secondary spontanuous spreading
Possible to find: May-October
Flight time of adults: May-October
Habitat: Forests, farmland, urban environments where Black locust trees are present.
Status in Slovenia: Widespread everywhere where Black locust trees occur.
Similar species: Several other midge species can not be distinguished with bare eyes, but the shape of the galls is characteristic.
More information on CABI