Its only species is Laeosopis roboris, the Spanish purple hairstreak, which is found on the Iberian Peninsula and south-eastern France.

Underside ashy grey, with a yellow margin in which stand light blue spots and before which are proximally pale-edged black dots.

(72 d) is the form from Portugal, which is more glossy yellow beneath and has a broad yellowish red marginal band bearing hardly any spots on the forewing.

Whereas nymotypical roboris occurs in South Spain, Staudinger obtained a transitional form in Castilia.

The butterflies occur from June till the autumn in valleys with trees and shrubs and are plentiful in some places; they settle particularly on ash and chestnut, and when disturbed generally return to the same spot and therefore are easily obtainedin good condition (Elwes).