Iteomyia capreae

Gall size up to 4 mm in diameter. The gall midge Iteomyia capreae is the commonest cause of galls to form on the leaves of sallows. The galls are hard, green domes which usually develop a red or purple tinge as the develop. They open on the underside of the leaf through small red-ringed pores. Each gall contains a single larva which is white when young later turning orange or red. Mature larva drop from the galls to overwinter in the soil before pupating in the spring.

Found wherever the host tree willow is growing. Common and widespread throughout Britain.

Class Insecta (Insects)
Order Diptera (True Flies)
Family Cecidomyiidae (Gall Midges)
Species Iteomyia capreae (Winnertz, 1853)

Photos: On Goat Willow (Salix caprea), back garden, South Staffordshire 13th June 2021. © Peter Hillman