1a full depth blotch: Dentifovea fulvifascialis

1b upper- or lower-surface corridor => 2

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

2a corridor independent of the leaf venation; frass in loose granules; pupation within the mine: Chromatomyia horticola

2b corrirdor on top of midrib and main lateral veins; frass in strings; pupation outside the mine: Liriomyza strigata