Denis & Schiffermüller, 1775
The wingspan is 29–33 mm although some northern races may be smaller. The forewings are white with a broad shaded band which varies from pale grey to almost black. The hindwings are also white with pale fascia and a small black discal spot. The species flies from May to July , usually at dusk. It will come to light but is not strongly attracted.
The larva is grey with a purplish-brown back. It has been recorded feeding on bedstraw, Corydalis, globeflower, hemlock and primrose and probably feeds on other low-growing plants. The species overwinters as a larva.
- X. m. iberica
- X. m. lapponica
- X. m. montanata
- X. m. shetlandica
Chinery, Michael Collins Guide to the Insects of Britain and Western Europe 1986 (Reprinted 1991)
Skinner, Bernard Colour Identification Guide to Moths of the British Isles 1984
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