Caloptilia alchimiella

Caloptilia alchimiella (commonly known as yellow-triangle slender) is a moth of the family Gracillariidae. It is found in Europe and the Near East.



The wingspan is 10 - 13 mm. Forewings purplish - ferruginous ; dorsum suffused with yellow towards base ; a large triangular yellow median costal blotch, apex often rounded. Hindwings dark grey. .

The moth flies from May to July depending on the location.

The larvae feed on Quercus species, Castanea sativa and Fagus sylvatica.