Diarsia intermixta (Guenée, 1852)
Chrevron Cutworm
(one synonym : Orthosia breviuscula Walker, 1865)
NOCTUINAE ,   NOCTUIDAE ,   NOCTUOIDEA
 
Don Herbison-Evans
(donherbisonevans@outlook.com)
and
Stella Crossley

Diarsia intermixta
(Photo: courtesy of Donald Hobern, Aranda, Australian Capital Territory)

This Caterpillar is a pest in Tasmania on:

  • Turnips ( Brassica rapa, BRASSICACEAE ),

    and is inclined to eat the leaves of many other dicotyledons, including :

  • White Mustard ( Sinapsis alba, BRASSICACEAE ), and
  • Cape Weed ( Arctotheca calendula, ASTERACEAE ).

    Diarsia intermixta
    (Specimen: courtesy of the Macleay Museum, University of Sydney)

    The adult moths are reddish-brown with a faint pattern on the forewings, sometimes including a dark or a white spot near the middle. They have a wingspan of about 3 cms.


    male, drawing by George Francis Hampson, listed as Agrotis compta,

    Catalogue of Lepidoptera Phalænæ in the British Museum,
    Noctuidæ, Volume IV (1903), Plate LXX, figure 18,
    image courtesy of Biodiversity Heritage Library, digitized by Ernst Mayr Library, Harvard University.

    The species is found in

  • Fiji, and
  • New Zealand,

    as well as in Australia in:

  • Queensland,
  • New South Wales,
  • Norfolk Island,
  • Australian Capital Territory,
  • Victoria,
  • Tasmania, and
  • South Australia.


    Further reading :

    Ian F.B. Common,
    Moths of Australia, Melbourne University Press, 1990, fig. 50.3, pp. 65, 461, 465, 467.

    Achille Guenée,
    Noctuélites,
    in Boisduval & Guenée:
    Histoire naturelle des insectes; spécies général des lépidoptères,
    Volume 9, Part 5, Section 1 (1852), p. 337, No. 566.


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    (updated 15 April 2013)