1a mine small, full depth, eventually a blotch in which an oval excision is cut => 2

1b mine upper-surface, a long, slender corridor, not ending in an excision: Phyllocnistis vitegenella

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

2a blotch preceded by slender gallery, at least as long as the diameter of the blotch: Holocacista rivillei

2b initial gallery very short, often overrun by the later blotch: Asilanta oinophylla