1a fleck mine => 2

1b no fleck mine => 4

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

0a larva in a fragment of the stem of a plant, generally a grass: Epidola stigma

0b larva in a case made of silk => 3

3a case with much adherent frass and plant debris: Coleophora atriplicis

3b case at most with a few plant fragments: Coleophora deviella

4a mine full depth; larva with chitinised head: Scrobipalpa nitentella

4b mine upper- or lower-surface; larva a maggot; at start of the mine a white egg shell => 5

5a egg shell finely reticulate, fragile; empty eggs often collapse: Botanophila depressa

5b egg shell firm, ribbed, not collapsing: Clanoneurum cimificorme