Diptera: Tephritidae - fruit fly Terellia colon Larvae feed in the capitula of Centaurea scabiosa (Greater Knapweed) without causing gall formation. Adult reared Host: Centaurea scabiosa. Very occasionally Centaurea jacea

Terellia colon
Larva collected Ballard Down, Dorset. July 2018. Adult reared