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The Dark Umber (''Philereme transversata'') is a moth of the Geometridae family. It is found in much of the Palearctic ecozone. The wingspan is 29–37 mm. Variable in colour but generally very constant in markings,forewing with all the lines sharply angulated near the costa, the postmedian with an unusually long, double projection at the first radial. The ground-colour is bright ochreous brown or dark brown, the lines darker, the median band sometimes almost dissolved into lines but oftener more or less solid, at times quite blackish. — ab. ''hastedonensis'' Lamhill. is a melanotic form in which the brown ground-colour of the type form is in a large measure replaced by blackish. Described from Belgium, but occurs also near London. — ''japanaria'' Leech is lighter, with the median area of the forewingnot or not appreciably darkened. Oiwake, Japan. 〔Prout , L.B. 1912–16. Geometridae. In A. Seitz (ed.) ''The Macrolepidoptera of the World.'' The Palaearctic Geometridae, 4. 479 pp. Alfred Kernen, Stuttgart. 〕 There is one generation per year with adults on wing from the beginning of June to August. The larvae feed on ''Rhamnus cathartica''. The larvae can be found from the end of April to June. The caterpillar has two forms, one pale green and the other dark brown and cream. It overwinters as an egg. ==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「Philereme transversata」の詳細全文を読む スポンサード リンク
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