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The Red Carpet (''Xanthorhoe decoloraria'') is a moth of the Geometridae family. It is found in North Europe East across the Palearctic to Siberia and the north of North America; further south (as from Switzerland to Austro-Hungary) it seems to occur chiefly, if not exclusively,in the mountains. The wingspan is about 32 mm. "Very variable, especially in Iceland, but the forms intergrade so completely that it seems unnecessary to impose names on any but the most extreme aberrations. The ground-colour varies from clear white to smoky grey, sometimes slightly brownish; the median band varies much in width and somewhat in shape;in colour it is usually pale dull reddish, sometimes darker reddish, sometimes grey or even blackish brown. — ab. ''algidata'' (Möschl.) Stgr. has the median band almost obsolete, being chiefly indicated by the principal lines which traverse it. It occurs in Iceland , but is said to be a common form, perhaps a local race, in Labrador.On the other hand Möschler says that his ''algidata'' cannot be confounded with any known species and the Zeller collection contained under this name a moth more like the Canadian ''fossaria'' Tayl. — ab. ''infuscata'' ab. nov. () Forewing much infuscated, dirty grey-brown with slight tinge of yellow, the median band weakly expressed, more reddish; hindwing dark smoke-coloured. Iceland, in my collection. — ''hethlandica'' Prout is a race from the Shetland and Orkney Islands with the ground-colour of the forewing strongly yellow ochreous. Similar, though less extreme examples occur occasionally among the other forms in Scotland and Iceland. — ''labradorensis'' Pack, has the ground-colour more grey, the band darker, more brown (not red). Labrador. ab. ''strigata'' Pack, seems to be merely an extreme development of ''labradorensis'', with the band black. — ''pauperrimata'' Chr., which I have not seen, is perhaps somewhat similar to ''hethlandica''. The ground-colour is pale ochreous, the median band uniformly reddish fuscous. Caucasus and the Issyk-kul and Hi district." 〔Prout , L.B. 1912–16. Geometridae. In A. Seitz (ed.) ''The Macrolepidoptera of the World''. The Palaearctic Geometridae, 4. 479 pp. Alfred Kernen, Stuttgart. 〕 Adults are on wing from mid June to August. The larvae feed on ''Alchemilla'' species and possibly other low plants. ==Subspecies== *''Xanthorhoe decoloraria decoloraria'' *''Xanthorhoe decoloraria hethlandica'' (Shetland Isles) 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「Xanthorhoe decoloraria」の詳細全文を読む スポンサード リンク
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