Dracocephalum dragonhead
Dichotomous table for leafminers
1a pinnately branched gallery, main and side branches on top of midrib and thick side veins: Liriomyxa strigata
1b gallery that freely winds over the leaf disk: Phytomyza nepetae
1c galls, etc. => Tables for all parasites per species
Hering (1957a) additionally mentions an unidentified Cnephasia (Lepidoptera).