Melanargia lachesis, the Iberian marbled white, is a butterfly species belonging to the family Nymphalidae.
It can be found on the Iberian Peninsula and the south of France.
The butterflies fly in one generation from June to August.They occur from the plain to about 1,600 meters above sea level. They prefer dry, flowering, natural meadows that can also be overgrown with bushes. The larvae feed on various grasses.