Diptera: Agromyzidae - gall fly Hexomyza sarothamni Photographs on Cytisus scoparius, Broom Hosts: Cytisus scoparius and Genista aetnensis Usually forms a lateral swelling in the stem to 25 x 8mm in size, the single chamber containing a whitish larva or a puparium. Emergence May - June Identification uncertain, needs confirming or correcting

Hexomyza sarothamni
Luscombe Valley NR, Dorset. October 2016