Last modified: April 10, 2021, 1:53 p.m.
Widespread in Belgium and locally common. Because of the Dutch elm disease (caused by the fungus Ophiostoma novo-ulmi and spread by elm bark beetles, Scolytidae), which caused the death of thousands of Ulmus trees, the larval host plant of this species, it almost disappeared from Belgium in the first of the 20th century. Hitherto it is present in all provinces.
Head black; forewing ground colour golden ochreous to reddish brown; a patch of black scales near the base; white pattern consisting of two transverse bands before the middle of the wing, inwardly edged with black scales; one triangular, costal stria, finely edged with black scales inwardly and a peculiar white dorsal stria connected to an apical white spot.
The species hibernates in the pupal stage. After the emergence of the adult, the pupal skin protrudes through the mine.
Two difficult to separate generations a year: from the end of April till early September.