1a fleck mine: the larva mines from a transportable case: Coleophora pulmonariella

1b gallery or blotch mine; the larva mines from the inside => 2

2a larva slender, with chitinised head (full grown larvae red): Dialectica imperialella

2b larva a whitish maggot => 3

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

3a larva: cephalic skeleton with 3 rearwards pointing arms: Agromyza abiens

3b cephalic skeleton with 2 rearwards pointing arms => 4

4a lorva solitary: Phytomyza lithospermi

4b larvae communally: Phytomyza medicaginis