Diptera: Cecidomyiidae - gall midge Contarinia coryli Photographs on Corylus avellana, Hazel. Host: Corylus avellana Catkins usually symetrically swollen, the enlarged scales brown at their base. The gregarious white larvae, jumping when disturbed, are present between spring and autumn. Simlar: Phyllocoptruta coryli galls are very similar but contain mites

Contarinia coryli
Kingston Lacy, Dorset. October 2018