The Lesser-spotted Pinion (Cosmia affinis) is a moth of the Noctuidae family. It is found in central and southern Europe, north to Great Britain, Denmark, southern Sweden up to Saint Petersburg. East, its range extends through northern and central Asia up to Japan. It is also found in north-western Africa. The wingspan is 28–33 mm. Adults are on wing from June to August in one generation. The larvae primarily feed on Ulmus species, but have also been recorded on Quercus, Tilia and Prunus spinosa.