1a long, narrow corridor, in a dense spiral or coiled intestine-like, ending in a blotch; larvae from mid August, with a light brown prothoracic shield: Mompha terminella

1b rather short, irregularly contorted corridor terminating in a blotch; larvae in June-July, , with a dark brown prothoracic shield: Mompha langiella

1c galls, etc => Tables for all parasites per species