Dichotomous table for leafminers
1a greenish, later brown blotch without an apparent initial corridor; a number of larvae share a mine: Gracillaria syringella
1b silvery blotch with a conspicuous initial corridor: larva solitary: Caloptilia cuculipennella
1c galls, etc. => Tables for all parasites per species
Not included in the key: Prays friesei (Canary Islands).