About Diarsia brunnea (Denis & Schiffermüller), 1775
This species, Diarsia brunnea (Denis & Schiffermüller), 1775, has a wingspan of 35–38 mm. Its forewings are pinkish or purplish-plum in colour, with a fulvous and yellow tint on the costal half. The cell is deep olive brown, the claviform spot is marked by a dark spot at its end, the orbicular spot is oblong and matches the ground colour, and the reniform spot is outlined or filled with ochreous. The hindwings are luteous (muddy yellow) fuscous, and the cilia are pink. Adult moths are active on the wing from July to August. The larvae are dark brown, with pale dorsal and subdorsal lines and whitish lateral lines. They have a row of pale yellow, dark-edged oblique stripes, and a yellow stripe across the 11th body segment. The larvae feed on a wide variety of herbaceous plants and shrubs, including Rumex species (such as Rumex acetosella), Dryopteris filix-mas, Luzula sylvatica, Deschampsia flexuosa, Brachypodium sylvaticum, Vaccinium myrtillus, Vaccinium uliginosum, Prunus spinosa, Primula, Rubus, Urtica, Salix and Betula.
