Since I read earlier in the year about the larvae of one of the case-bearing moths living on Hedge woundwort (Stachys sylvatica), I’ve been checking those plants whenever I see them. I’ve not yet found the Coleophora species but, a week or so ago, I did find some leafmines I’d never seen before. These are the larval mines of the fly Cephalomyza (formerly Amauromyza) labiatarum and they can, in fact, be found on a very wide range of plants (the Agromyzidae Recording Scheme website lists the following species: Ajuga, Ballota, Galeopsis, Glechoma, Lallemantia, Lamiastrum, Lamium, Leonurus, Lycopsis, Marrubiam, Melissa, Mentha, Prunella, Satureja, Scutellaris, Stachys, Teucrium, and Verbena). As you can hopefully see from my photos, the larva’s initial feeding creates a long thin line, which later becomes a large blotch mine. You can see more images on the Agromyzidae RS site referenced above and on the British Leafminers website.