Wingspan 19-28 mm.
In Britain, this species is restricted to a few areas of coastal shingle in the south-east of England. There are some older records from more inland localities which may refer to migrants.
The main flight period is May and June, but there is also a partial second generation in the autumn.
Viper's bugloss (Echium vulgare) is the larval foodplant in this country, both flowers and leaves being consumed.