Hymenoptera: Cynipidae - gall wasp Phanacis caulicola Photographs on Picris echiodes (Helminthotheca), Bristly Oxtongue Hosts: Picris echioides, hieracioides Larvae feed in 2-3mm long chambers inside the flowering stems, pupating within the chamber. No external sign or thickening but small holes are visible in stems after adults have emerged

Phanacis caulicola
Holes Bay, Poole, Dorset. January 2018