Xylena exsoleta

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Xylena exsoleta
Xylena exsoleta.01.jpg
Mounted adult specimen
Noctuidae - Xylena exsoleta-1.jpg
Caterpillar
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Superfamily: Noctuoidea
Family: Noctuidae
Genus: Xylena
Species:
X. exsoleta
Binomial name
Xylena exsoleta

Xylena exsoleta, the sword-grass, is a species of moth of the family Noctuidae.

Contents

Technical description and variation

The wingspan is 58–68 mm. The length of the forewings is 24–29 mm. Forewing long and narrow. 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. [Warren]; 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. [1]

Biology

The moth flies from September to July depending on the location.

Larva green; dorsal and subdorsal lines broadly yellow; spiracular line red, pale-edged beneath, with the yellow spiracles above it; tubercles white with broad blackish rings. The larvae are widely polyphagous, feeding on various deciduous trees, shrubs and herbaceous plants, including Epilobium , Lilium , Iris , Rumex , Euphorbia , Ononis , Allium cepa , Brassica oleracea and Delphinium . [2] The caterpillars of sword-grass can reach a length of approximately 60 mm. They are green, with black blotches, white lateral lines and orange markings. Like many similar species, they make their metamorphosis underground.

Distribution

It is found from the Canary Islands and north-western Africa through Europe, the Near East and central Asia up to the Pacific and Japan.

Habitat

These moths prefer moorlands and woodlands.

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References

  1. 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
  2. "Robinson, G. S., P. R. Ackery, I. J. Kitching, G. W. Beccaloni & L. M. Hernández, 2010. HOSTS - A Database of the World's Lepidopteran Hostplants. Natural History Museum, London".