Diarsia dahlii

Diarsia dahlii, the barred chestnut, is a moth of the family Noctuidae. The species was first described by Jacob Hübner in 1813. It is found in Europe, through the Palearctic east to the Kamchatka Peninsula, northern China and Japan.

Diarsia dahlii
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Lepidoptera
Family:
Noctuidae
Genus:
Diarsia
Species:
D. dahlii
Binomial name
Diarsia dahlii
(Hübner, 1813)
Synonyms
  • Noctua dahlii Hübner, 1813

Description
For a key to the terms used, see Glossary of entomology terms.

The wingspan is 28–40 mm. Forewing reddish brown with an ochreous tint in the male, darker, purplish brown in female; lines plain in the paler males; stigmata of the ground colour, the reniform with the lower lobe dark, the upper sometimes ochreous; claviform with a black dot at the tip; a distinct dark median shade; in the female the submarginal line is pale; hindwing dull fuscous, the fringe pinkish. It is a variable species occurring under different forms: ab. nana Stgr. from south-eastern Siberia is a dwarf form, not much more than half aslarge as the typical form.[1]

Biology

Adults are on wing from August to September depending on the location.

The larvae feed on Betula, Vaccinium myrtillus, Rumex and Plantago.[2]

Subspecies
  • Diarsia dahlii dahlii (central and northern Europe, Caucasus, Transcaucasia, Kazakhstan)
  • Diarsia dahlii nana (central Siberia to eastern Siberia, northern China, Mongolia)
  • Diarsia dahlii tibetica (southern China, Tibet)

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, Gaden S.; Ackery, Phillip R.; Kitching, Ian J.; Beccaloni, George W.; Hernández, Luis M. (2010). "Search the database - introduction and help". HOSTS - A Database of the World's Lepidopteran Hostplants. Natural History Museum, London.


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