Diptera: Cecidomyiidae - gall midge Contarinia tiliarum Gall on Tilia, Lime Hosts: Tilia cordata, x europaea, platyphyllos, tomentosa Hard swelling in petioles, peduncles and occasionally extending into midrib of leaf. Galls contain one to several chambers, each with a yellowish, jumping larva. Single generation, pupation in the soil

Contarinia tiliarum
Wimborne, Dorset. June 2018