Pegomya rubivora (Coquillett in Slingerland, 1897)
raspberry cane maggot
on Filipendula, Rubus
gall (from Eaton)
The solitary larva bores in the pith of a young shoot, causing a conspicuous swelling. Halfway the gall the tiny hole is visible that was made by the fly at the oviposition. The top part of the shoot wilts.
distribution within Europe
egg, larva, puparium
all stages are described and illustrated by Dušek:
cephalic skeleton of 3rd instar larva
Buhr (1964b, “rubicola”), Dušek (1970a), Eaton (2016a), Suwa (1974a).