Idaea inversata (Guenée, 1857)
Purple wave
(one synonym : Acidalia albicostata Walker, 1861)
STERRHINAE,   GEOMETRIDAE,   GEOMETROIDEA
 
Don Herbison-Evans
(donherbisonevans@outlook.com)
and
Stella Crossley

Idaea inversata
(Photo: courtesy of Dianne Clarke, Mapleton, Queensland)

The Caterpillars of this species are brown with three pairs of prolegs missing, so walk in a looper fashion. The caterpillars have been found feeding on

  • Common Knotgrass ( Polygonum aviculare POLYGONACEAE ).

    The adult moths are reddish brown, with a series of dark parallel wiggly lines across each wing, and a pale line along the costa of each forewing. The wingspan is about 2 cms.

    Idaea inversata
    (Photo: courtesy of Buck Richardson, Kuranda, Queensland)

    The eggs are ovoid and initially off-white, and turn pink just before hatching. They are laid in small clusters.

    The species is found in Australia in:

  • Queensland,
  • New South Wales,
  • Australian Capital territory,
  • Victoria,
  • Tasmania,
  • South Australia, and
  • Western Australia.

    Idaea inversata
    male
    (Photo: courtesy of Peter Marriott, Moths of Victoria: Part 3)


    Further reading:

    Achille Guenée,
    Uranides et Phalénites,
    in Boisduval & Guenée: Histoire Naturelle des Insectes; Spécies Général des Lépidoptères,
    Volume 9, Part 9 (1857), p. 467, No. 783.

    Peter B. McQuillan, Jan A. Forrest, David Keane, & Roger Grund,
    Caterpillars, moths, and their plants of Southern Australia,
    Butterfly Conservation South Australia Inc., Adelaide (2019), p. 104.

    Peter Marriott,
    Moths of Victoria: Part 3,
    Waves & Carpets - GEOMETROIDEA (C)
    ,
    Entomological Society of Victoria, 2011, pp. 10-11.


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    (updated 19 December 2010, 8 October 2013, 3 May 2017, 17 February 2018)