This individual 12mm long, another was 22mm long. The longer one was observed on a rendered wall ca. four days ago. Both are on a concrete pavement adjacent to that wall.
Yes there are really interesting. I have often wondered what they are. I have also wonder if they could even be from another group - e.g. terrestrial caddisfly larva?? I don't think we can assume they are Psychidae = case moths. As DonHE would say - should raise them to find out.
Interesting! Are there such things as terrestial caddisfly larvae? I understood they were all aquatic. Similar creatures are illustrated here https://www.flickr.com/photos/dhobern/albums/72157609580850398/ in addition to the other link I sent. Update: You suggest caddisfly larvae, but have listed them as "Lepidoptera immature". The terrestrial caddisfly larvae which I can find is a reference to a single species from the Family Calocidae, Caloca seneva, restricted to Tasmania and found in damp environments.