Thumatha senex, the round-winged muslin, is a moth of the family Erebidae. It is found in northern and central Europe, the Alps, northern Asia Minor, the Crimea and south-western Siberia.

Thumatha senex
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Superfamily:	Noctuoidea
Family:	Erebidae
Subfamily:	Arctiinae
Genus:	Thumatha
Species:	T. senex
Binomial name
Thumatha senex (Hübner, 1808)
Synonyms
Bombyx senex Hübner, [1808] Nudaria rotunda Haworth, 1809 Comacla senex Comacla senex karvajszkyi Diószeghy, 1923

Technical description and variation

The wingspan is 15–20 mm. Not unlike Nudaria mundana ( mundana has less-rounded forewings and a more transparent appearance, less obvious spots). The central spot at the apex of the cell distinct; a larger shadowy spot at the middle of the costa, and before the marginal area of the forewing a row of spots which are especially distinct in the costal region. Another curved row of spots bounds the basal third of the forewing.[1] The wings are sparsely scaled, giving them a thin, papery appearance.

Biology

Adults are on wing from mid-June to mid-August in one generation.

Egg round, yellow. Larva ashy grey, very hairy, with black head. The larvae feed on lichen (especially Peltigera canina) and mosses. Pupa stumpy, dark brown, in a dense hairy cocoon.

The moths fly on damp meadows, and are not rare in their flight-places; they come to the light at night.

References

External links

Wikimedia Commons has media related to Thumatha senex.

Wikispecies has information related to Thumatha senex.

• Round-winged muslin on UKmoths
• Fauna Europaea
• Lepidoptera of Belgium
• Lepiforum.de

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