Species account from Moths of Glamorgan
(Gilmore, Slade & Stewart, 2009):

First recorded in 1908 at Miskin (EUD), subsequently with just a few scattered records up until the 1990s, when an increase in frequency became apparent. It is likely that the species has always been very localised and maintains only a tenuous hold in the county, usually in suburban situations where the larval foodplants such as Delphiniums are grown.