Seq # 901760110

Xylena exsoleta (Linnaeus, 1758) Species

Last modified: Sept. 21, 2023, 4:36 p.m.

This species has not been seen in Belgium for a very long time. Presumably extinct.


Family: Noctuidae > Subfamily: Xyleninae > Tribus: Xylenini > Genus: Xylena > Subgenus: Xylena > Species: Xylena exsoleta
Vernacular names
Roetvlek (NL), Sword-grass (EN), Le Bois-sec (FR), Graue Moderholzeule (DE)
First mention in Belgium
De Sélys-Longchamps E. 1844. Énumération des insectes Lépidoptères de la Belgique. — Mémoires de la Société royale des Sciences de Liége 2: 1–35. On page 13.




Wingspan: 55–68 mm.

Museum specimens

Specimens in nature

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The moths developed in the pupa and then rested until September, when the adult emerged after the onset of cooler weather.
The species would be attracted to the pheromone of Acrolepiopsis assectella.

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Flight periods

They fly from September onwards. Then they hibernate for the winter and reappear in March or April till May.

Observed on

Deciduous trees, Shrubs, Herbaceous plants and Grasses

The larvae are polyphagous, but feed often on Fabaceae, but also on other plants like Rumex , Helianthemum etc...

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It inhabits grasslands, fringes, dry warm ruderal terrain, fallow land and embankments.

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