Local in England, Wales and southern Scotland; rare in Ireland. In Hampshire local and sparsely distributed across much of the county, although apparently absent from the New Forest. Not recorded from the Isle of Wight to date. Wingspan 17-20 mm. The most likely confusion species is A. conterminella, which see for differences. Larva feeds on St John's-wort, living between leaves spun together with silk.
The abundance in each month is indicated as follows:
No records Very occasional Irregular Uncommon Off-peak, but not unusual Off-peak, but not unusual Main flight time