1a fleck mine, larve mines from a portable case => 2

1b no fleck mine; larva mines from the inside => 4

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

2a spatulate leaf case: Coleophora unigenella

2b tubular silken case => 3

3a full grown case before the end with a constriction: Coleophora nubivagella

3b full grown case not constricted: Coleophora derasofasciella

4a corridor along the leaf margin, then widening into a blotch; larve mines all its life: Stigmella dryadella

4b blotch; if an initial corridor is at all visible, it does not run along the leaf margin; the older larve lives free in a leaf that is spun into a pod: Parornix alpicola *