Apatura ilia f. Clytie
The male of the Lesser Purple Emperor has the distinction of having a blue iridescence that appears by exposure to light. The clytie form for this species has orange stripes on top of its wings while they are white in specimens of Ilia form :
Underside wings :
''Apatura ilia'', the lesser purple emperor, is a species of butterfly native to most of Europe and temperate Asia. It is named for its similarity to the purple emperor butterfly.