Very rare immigrant to the south coast of England from central Europe. One of unknown origin was recorded in the grounds of Buckingham Palace on 12 July 1995, which may have been an adventive, but subsequent individuals at Dungeness in September 2006 and Thanet (both Kent) in 2015 and 2018, along with the following Hampshire record are likely to be primary immigrants. In our area, one was taken at light by John Langmaid in Southsea (VC12) in July 2015, gen det Brian Elliott and confirmed by David Agassiz. Wingspan 16-18 mm. Distinctive nut-brown forewing and, in males, diagnostic indentation in costal edge of hindwing about one quarter along the wing, visible with a lens from below. No evidence of breeding in the UK.