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 . Forewings purplish - ferruginous; dorsum suffused with yellow towards base; a large triangular yellow median costal blotch, apex often rounded. Hindwings dark grey. .Meyrick, E., 1895 A Handbook of British Lepidoptera MacMillan, London pdf Keys and descriptionKuznetsov V.I., 1990 Gracillariidae; in G.S. Medvedev (ed.): Keys to the insects of the europaean part of the USSR, Vol.IV: Lepidoptera, part 2 (english translation), Oxonian Press Pvt.Ltd., New Dehli, 1987 Heath, J. & Emmet, A. M. (Hrsg.) (1985): The Moths and Butterflies of Great Britain and Ireland. Volume 2: Cossidae – Heliodinidae. Harley Books, Colchester, Essex.
The moth flies from May to July depending on the location.
The larvae feed on Quercus species, Castanea sativa and Fagus sylvatica.
References
External links Lepiforum de Microlepidoptera.nl Lepidoptera of Belgium Bladmineerders.nl UK Moths