1a corridor, independent of the midrib: Chromatomyia cf. syngenesiae

1b corridor overlying the midrib, or originating there => 2

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

2a corridor with its side branches overlying the midrib and thick lateral veins: Liriomyza strigata

2b several corridors, seemingly originating independent of each other at the midrib: Ophiomyia beckeri