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of the Lepidoptera of Belgium


Cosmia pyralina ([Denis & Schiffermüller], 1775)

A rare species throughout Belgium. Numbers can fluctuate heavily from year to year.

The larva lives mainly on Ulmus between spun leaves, but also on other deciduous trees and shrubs such as Crataegus, Prunus spinosa and Malus. Hibernates as an egg. Pupation in a cocoon among debris.

The adults fly in one generation a year; from early June till late August, with a peak around end June and beginning of July. They come to light and sugar.


Belgium, Namur, Belvaux, 01 July 2006.
(Photo © Chris Steeman)
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© Flemish Entomological Society