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The Square-spotted Clay (''Xestia stigmatica'') is a moth of the Noctuidae family. It is found in most of Europe, Transcaucasia, Caucasus, Kazachstan, northern Turkey and northern Iran. The wingspan is 37–44 mm. Distinguished from other ''Xestia'' by the broad forewing coloured greyish dark brown (sometimes purple-tinted) and the irregular broad dark band between the wavy line and the outer cross line. Adults are on wing from in August. The larvae feed on a variety of plants such as ''Rubus fruticosus'', ''Urtica dioica'', ''Prunus spinosa'', ''Primula'' and ''Betula''. ==Taxonomy== The species was known as ''X. rhomboidea'' up to 1997. Since the taxonomic revision by Hacker in 1998, the name ''Xestia stigmatica'' is in use and was used by Fibiger & Skuhle in 2004 as well as on Fauna Europaea. The reason for the change is that ''Phalaena Noctua rhomboidea'' as described by Esper in 1790 is actually the Double Square-spot (''X. triangulum''), but Esper's name had been misapplied to the Square-spotted Clay. 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「Xestia stigmatica」の詳細全文を読む スポンサード リンク
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