Wikipedia
Barbicornis
Barbicornis is a genus of the family Riodinidae with a single species Barbicornis basilis present in Paraguay, Brazil and Argentina.
The species is easily recognizable by the very small hindwings provided with a long apex of the tail on the lower radial (uppermost median) vein.The original description was published in Encyclopédie Méthodique.The imagines drink early in the morning from wet stones and places on roads or tracks and rest in day-time beneath leaves.