Datura thorn-apple
Dichotomous table for leafminers
1a mine small; larve with recognisable head; only the young larvae do mine: Cnephasia asseclana
1b large corridor or blotch; larvae, maggots, mine till just before pupation => 2
1c galls, etc => Tables for all parasites per species
2a upper- or partly lower-surface corridor: Liriomyza bryoniae
2b blotch mine: Pegomya hyoscyami
Not included in the key: Liriomyza trifolii; Tuta absoluta.