1a Narrow gallery, abruptly widening into a blotch; larva with well-recognisable head: Stomphastis conflua

1b gallery not widened into a blotch; larva a maggot => 2

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

2a gallery pinnately branched, main and side branches on top of midrib and side veins: Liriomyza strigata

2b gallery not or only little branched; its course not determined by the venation: Liriomyza bryoniae