Arhodia lasiocamparia Guenée, 1857
Pink Arhodia
(one synonym : Nigasa subpurpurea Walker, 1860)
OENOCHROMINAE ,   GEOMETRIDAE ,   GEOMETROIDEA
 
Don Herbison-Evans
(donherbisonevans@outlook.com)
and
Stella Crossley & Peter Marriott

Arhodia lasiocamparia
(Photo: courtesy of Mike and Pat Coupar,
from: "Flying Colours", Coupar & Coupar, 1992)

This species is widespread in most of mainland Australia and Tasmania, where the larvae feed on

  • Gum Trees ( Eucalyptus, MYRTACEAE ).

    The Caterpillars are fawn, sometimes greenish or reddish, and have a knob on the tail. They have only two pairs of prolegs, and so move in a looper fashion. They normally rest motionless by day, and feed at night.

    Arhodia lasiocamparia
    pupa
    (Photo: copyright Cathy Young)

    The adult moths are brown, but have forewing patterns that are somewhat variable.

    Arhodia lasiocamparia
    Male
    (Photo: copyright Cathy Young)

    Some have a row of dark dots or a vague line running about 5 mm from the outside edge of the wing. There is a dark mark about halfway along the trailing edge of each forewing. The rear wings are more variable, ranging from a pink, through salmon to a drab pink tinged brown. A distinct diagonal line usually runs through the middle of each rear wing.

    Arhodia lasiocamparia
    Male
    (Photo: copyright Peter Marriott)

    Adult males often come to lights in October, November, December and January. Females rarely come to lights (less than 5%). The female wings are a slightly different shape, larger but similar colour to males. Also, the antennae of female is almost threadlike, whereas that of a male is obviously 'feathered'.

    Arhodia lasiocamparia
    Wings and one antenna of female
    (Photo: copyright Peter Marriott

    Both sexes have a large blotch on the underside of the forewing. The underside of the rear wing is a light brown. Male wingspan up to 6 cms, female 7 cms.

    Arhodia lasiocamparia
    Male, underside,
    showing purplish blotch on underside
    (Photo: copyright Peter Marriott

    The eggs are spherical and pale grey, and are laid in a row along the edge of a foodplant leaf.

    Arhodia lasiocamparia
    eggs
    (Photo: courtesy of Steve Williams, Moths of Victoria: Part 4)

    Ths species is found over most of Australia, including

  • Tasmania,
  • South Australia,
  • Western Australia,
  • Northern Territory,
  • Queensland,
  • New South Wales,
  • Australian Capital Territory,and
  • Victoria, where we have found the species in a variety of locations:
  • coastal (Mt. Martha on Mornington Peninsula),
  • wet sclerophyll (Kallista in the Dandenong Ranges),
  • dry (Riddells Creek N-W of Melbourne), and
  • in north central Victoria (North of Yea, 600m).

  • Further reading :

    Ian F.B. Common,
    Moths of Australia,
    Melbourne University Press, 1990, fig. 36.9, p. 369.

    Pat and Mike Coupar,
    Flying Colours,
    New South Wales University Press, Sydney 1992, p. 37.

    Achille Guenée,
    in Boisduval & Guenée: Uranides et Phalénites,
    Histoire naturelle des insectes; spécies général des lépidoptères,
    Volume 9, Part 9 (1857), p. 186, No. 288..

    Peter Marriott,
    Moths of Victoria: Part 4,
    Emeralds and Allies - GEOMETROIDEA (B)
    ,
    Entomological Society of Victoria, 2012, pp. 12-13.


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    (updated 18 June 2013, 29 August 2014)