Portulaca purslane, pigweed
Dichotomous table for leafminers
1a mine upper- and/or lower-surface => 2
1b mine essentially full depth, transparant: Hypurus bertrandi
1c the larva mines from a transportable case: Coleophora texanella
1d galls, etc => Tables for all parasites per species
2a narrow corridor, continued in a blotch; larva a maggot: Scaptomyza graminum
2b corridor from start to end: Liriomyza trifolii