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The light knot grass (''Acronicta menyanthidis'') is a moth of the family Noctuidae. It is distributed through northern, central and eastern Europe, east to Siberia and the Russian Far East. :''See glossary for terms used'' The wingspan is 33–41 mm. Forewing bluish white, dusted and shaded with dark grey; a short black streak from near base; marginal area darker, sometimes blackish, grey; orbicular stigma quite small.- In the ab. ''suffusa'' Tutt the whole forewing is suffused with dark grey. - ab. ''obsoleta'' Tutt has the forewing quite pale with all markings faint; on the contrary ab. ''scotica'' Tuff from the west coast of Scotland is larger and brighter than the type, with all markings clear and distinct.〔Seitz, A. Ed., 1914 ''Die Großschmetterlinge der Erde'', Verlag Alfred Kernen, Stuttgart Band 3: Abt. 1, Die Großschmetterlinge des palaearktischen Faunengebietes, Die palaearktischen eulenartigen Nachtfalter, 1914 〕 The adults fly at night from May to July . They are attracted to light. The caterpillar is blackish-brown with a red spiracular line with white dots. It feeds on moorland plants like bog myrtle and bilberry. Recorded foodplants include ''Myrica'', ''Calluna'', ''Vaccinium'', ''Salix'', ''Betula'', ''Ranunculus aconitifolius'', ''Comarum palustre'', ''Lysimachia nummularia'' and ''Menyanthes trifoliata''. #''The flight season refers to the British Isles. This may vary in other parts of the range.'' == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Acronicta menyanthidis」の詳細全文を読む スポンサード リンク
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