2-7-2020 ROSSELL, CASTELLON - IBERIAN MARBLE WHITE BUTTERFLY (Melanargia lachesis)

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 length of the forewings is 25–28 mm. Seitz- M. lachesis Hbn. (= nemausica Esp.) (38b). Lighter than galathea, even than the lightest forms of the same. The black discocellular anguliform spot of the forewing constricted where it is bent. Hindwing entirely white, apart from the interrupted submarginal band; the base very sparingly dusted, the markings of the underside however shine through in the male. In Spain, Portugal and South France. – The specimens with creamy yellow ground-colour, which are somewhat rarer than the chalky white canigulensis Obth.; from the Pyrenees.

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.

The Iberian Marbled White (Melanargia lachesis) is a distinctive black-and-white butterfly native to the Iberian Peninsula and southern France. Despite its common name, it is actually part of the "Brown" family (Satyrinae) rather than the true whites.

Key FactsAppearance: It features a striking chequered black and white pattern. It is distinguished from the similar Marbled White (M. galathea) by having less black at the base of its forewings and a generally whiter appearance.

Size: This is a relatively large butterfly, with some individuals reaching a wingspan of up to 6 cm.

Distribution: It is almost exclusively found in Spain, Portugal, and southern France as far as the Rhône valley. In northern Spain and southern France, its range overlaps with its cousin, the common Marbled White.

Habitat: It thrives in hot, dry, flowery grasslands and meadows, often on calcareous soils.Diet: Adults frequently feed on the nectar of purple flowers like knapweed, thistles, and scabious.

Life Cycle:It is univoltine, meaning it produces only one generation per year, with adults flying between June and August.Caterpillars feed on various grass species (such as Festuca and Brachypodium) and hibernate through the winter while still small.Unusually, females do not attach their eggs to plants; they drop them randomly onto the ground while flying over tall grasses.