About Catoptria margaritellus (Denis & Schiffermüller), 1775
Catoptria margaritellus, commonly called the pearl-band grass veneer, is a moth species belonging to the family Crambidae. It was originally described by Michael Denis and Ignaz Schiffermüller in 1775, and it is found across Europe. This moth has a wingspan ranging from 20 to 24 mm. Its forewings are ferruginous brown, turning ferruginous-yellow on the dorsal side; they feature a shining white median streak that gradually widens from the base to near the termen. This streak is broadest at the level of vein 4, tapers to a point after that, and has a straight upper edge. The forewing cilia are a shining pale fuscous. The hindwings are light grey-brown. Adults fly from June to September, with flight timing varying by location. The larvae feed on a wide variety of grasses and mosses.
