Diagnostic horseshoe-shaped whitish blotch on the dorsum, and a fairly distinctive white hindwing with a dark border.
First Norfolk record since 1899 to MV light at Snettisham in 2011 (R. Evison, 01/04/11)
Recorded at Crostwight Heath VC27 in 2014 (M. A'Court, 17/03/14, gen. det. male. J. Wheeler)
Attracted to To SKI pheromone lure.
Old records from 1874 to 1899, noted as scarce. (C.G. Barrett)
Also recorded at Belton Fen, East Suffolk VC25 (Jones, 01/04/11)
Recorded in 20 (29%) of 69 10k Squares.
First Recorded in 1874.
Last Recorded in 2021.