Dichotomous table for leafminers
Larvae of Chironomidae may tunnel corridors in submerged stems; these are not treated here. (Hering, 1957a, provides a key).
1aa broad corridor widening into a blotch; mine full depth, transparant; larva with chitinised head: Bagous alismatis
1b corridor from begin to end (but may form a secondary blotch), initially lower-surface, later turning upper-surface; larva a maggot: Liriomyza bryoniae
1d galls, etc => Tables for all parasites per species