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The Chestnut-coloured Carpet or Durham Juniper Moth (''Thera cognata'') is a moth of the Geometridae family. It is found in Europe, Asia Minor, the Caucasus and Transcaucasus. The wingspan is 26–30 mm. The forewings are reddish-brown. The median band and the basal field are darker in color and these dark fields are delimited with black and white cross lines. The hindwings are whitish. ''Thera cognata'' is easily distinguished from ''Thera variata'' by its strong purple-brown or red-brown gloss. Hindwing a little more glossy than in ''Thera obeliscata''.The typical northern form is rather small and in general dark reddish. - ''geneata'' Feisth., the prevailing form in the Alps and in Transcaucasia, perhaps also in the Pyrenees, is larger, somewhat paler and with a less definite red tinge, the ground-colour being somewhat mixed with violet or purplish. — ab. ''perversa'' Hirschke is an aberration of ''geneata'', from the Franzenshohe, in which the basal and median areas of the forewing, instead of being darker than the ground colour of the wings, are lighter. 〔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 July to August in one generation. The larvae feed on ''Juniperus'' species. ==Subspecies== *''Thera cognata cognata'' *''Thera cognata geneata'' (Feisthamel, 1835) 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「Thera cognata」の詳細全文を読む スポンサード リンク
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