The Psychidae are rather mysterious moths, which one stumbles across by luck (or careful searching). I was surprised to spot this Psyche casta case on limestone at Red Chamber, S Gower today; I then noticed another 11 on nearby rocks! The only Carms records of this species are from Pendine and Pembrey, but there's no reason why they shouldn't be inland as well: I used to see them occasionally stuck to leaves in woodland in Monmouthshire.
There are two other Psychidae on the Carms list. Luffia ferchaultella was recorded by Barry Stewart from 2 sites near Llanelli in 2005, and I saw one on a lichen-rich Oak trunk at Dinefwr a couple of years back. Again, there's no reason why Luffia cases shouldn't be more widespread in Carms: I found it on plenty of trees at Dingestow, and also on walls and even an algae-covered trailer! Diplodoma herminata (laichartingella) was caught by Jon at Trawsmawr in June 1999.
This Pyrausta cingulata was on the Thyme-rich slopes as well.