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The Four-spotted Footman, ''Lithosia quadra'', is a moth of the family Arctiidae. It is found in Southern and Central Europe then East across the Palearctic to the Amur River and Japan. It is also found in the South of Great Britain and Scandinavia. The wingspan is 35–55 mm, the males are smaller than the females. There is strong sexual dimorphism in the imago, the males have gray wings with a yellow wingjoint and a blue-black stripe at the front of the outer rim of the forewing. The females have yellow wings with two blue-black dots.It is the biggest species of the subfamily Lithosiinae. ==Technical Description and variation== :''See glossary for terms used'' The male is much smaller than the female brown-grey with a leaden gloss, thorax and base of wings golden yellow, costa metallic blue-green at the base. The female yellow, the forewing with a black-blue spot behind the centre of the costa and above the inner margin. The Japaneses form, ''dives'' Butl, is said to have darker males but the comparison of a large number of specimens proves that this difference is not constant.The European specimens vary considerably, the females with regard to the size and the males in the colouring.In exceptional cases one of the dots (ab. ''unipuncta'' Spul.) or both (ab. ''impunctata'' Spul.) may be absent in the female, or replaced by a transverse band (ab. ''fasciata'' Spul, ''confluens'' Dumont)〔Seitz, A. Ed. Die Großschmetterlinge der Erde, Verlag Alfred Kernen, Stuttgart Band 2: Abt. 1, Die Großschmetterlinge des palaearktischen Faunengebietes, Die palaearktischen Spinner und Schwärmer, 1912- 1913〕 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「Lithosia quadra」の詳細全文を読む スポンサード リンク
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