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The Sword-grass ''(Xylena exsoleta)'' is a species of moth of the family Noctuidae. ==Technical Description and variation== :''See glossary for terms used'' The wingspan is 58–68 mm. The length of the forewings is 24–29 mm. Forewing long and narroe.Differs from Xylena vetusta in being mainly dark or blackish grey, the ochreous ground showing only in a longitudinal streak above the median vein broadening along vein 5; orbicular stigma large and well-marked, with black linear centre and outline; lines marked by pairs of black spots on veins; submarginal line preceded by two wedgeshaped black marks which do not reach the reniform; hindwing dark fuscous. Co-extensive in range with ''vetusta''; the form occurring in Central Asia is differentiated by Staudinger as ab. ''impudica'', the ground colour being paler, more ashy grey, with less distinct markings; in ab. ''obscurata'' Spul. the whole forewing is suffused with brown; the opposite to this, in which all the black grey shading is absent and the whole forewing, except narrowly along costa, is pearly grey, may be called ab. ''pallescens'' ab. nov. () ; in this the markings are as distinct as in the type form, and the hindwing is quite pale fuscous; there are 4 males of this form in the Tring Museum from Europe, one marked Crimmitschau and the other 3 without more precise locality. 〔Seitz, A. Ed., 1914 ''Die Großschmetterlinge der Erde'', Verlag Alfred Kernen, Stuttgart Band 3: Abt. 1, Die Großschmetterlinge des palaearktischen Faunengebietes, Die palaearktischen eulenartigen Nachtfalter, 1914 〕 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「Xylena exsoleta」の詳細全文を読む スポンサード リンク
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