Dichotomous table for leafminers
1a upper- or lower-surface corridor: Liriomyza bryoniae
1b blotch => 2
1c galls, etc => Tables for all parasites per species
2a mine full depth, very transparant, no trace of feeding lines; larvae, with feet and chintised head, often partly protruding from the mine: Acrolepia autumnitella
2b mine indistinctly upper-surface, when fresh feeding lines visible; larvae maggots, never protruding from the mine: Pegomya hyoscyami
Not included in the key: Liriomyza strigata.