Polyommatus dolus, the furry blue, is a butterfly of the Lycaenidae family. It is found in Spain (from Huesca to Santander - Burgos), in France (Herault and from the Cevennes to the Maritime Alps) and Italy (Central Italy and Maritime Alps). Habitats are dry acid grassland, dry calcareous grasslands and steppes and sclerophyllous scrub at 600-1800m.The butterfly flies from July to August. The larvae feed on Onobrychis viciifolia and Medicago species.