Arnoseris lamb’s succory, swine’s succory
Dichotomous table for leafminers
1a corridor: Chromatomyia cf. syngenesiae
1b blotch => 2
1c galls, etc => Tables for all parasites per species
2a secondary feeding lines clearly present: Liriomyza sonchi
2b no secondary feeding lines visible: Liriomyza taraxaci