Azelina biplaga Walker, 1869
Acute Point Moth
(one synonym is Metrocampa glaucias Meyrick, 1892)
LITHININI,   ENNOMINAE,   GEOMETRIDAE,   GEOMETROIDEA
 
Don Herbison-Evans
(donherbisonevans@outlook.com)
and
Cathy Byrne & Stella Crossley


early instar
(Photo: copyright Cathy Byrne)

These Caterpillars when young are green with black dots, sparse hairs, and a yellow head. Later instars develop red coloration around the head and thorax.


late instar
(Photo: copyright Cathy Byrne)

The caterpillars feed on :

  • Bracken ( Pteridium esculentum ( POLYPODIOPHYTA ).


    caterpillar head, magnified
    (Photo: copyright Cathy Byrne)

    The adult moth is brown, sometimes with a straight dark-edged yellow submarginal line and/or row of dark spots, and sometimes a dark spot or outlined circle near the centre of each forewing. The forewings each have hooked tips. The wings each have a cusp on the margin. The wingspan is about 4 cms.

    Metrocampa biplaga
    (Photo: copyright Cathy Byrne)

    The eggs are spherical and white, developing red markings as hatching approaches.


    eggs, magnified
    (Photo: copyright Cathy Byrne)

    The species is found in

  • New South Wales,
  • Victoria,
  • Tasmania, and
  • South Australia.


    underside
    (Photo: courtesy of Joan Fearn, Moruya, New South Wales)

    The moth is related to Gynopteryx ada but is larger, with larger circles on the forewings, and the males have smaller fringes than those of Gynopteryx ada. The genera Azelina, Gynopteryx and Metrocampa are inappropriate for these species, but a suitable genus has yet to be found.


    Further reading :

    Ian F.B. Common,
    Moths of Australia, Melbourne University Press, 1990, p. 366.

    Marilyn Hewish,
    Moths of Victoria: Part 7,
    Bark Moths and Allies - GEOMETROIDEA (D)
    ,
    Entomological Society of Victoria, 2016, pp. 6-7, 10-11.

    Edward Meyrick,
    Revision of Australian Lepidoptera V,
    Proceedings of the Linnean Society of New South Wales,
    Series 2, Volume 6, Part 4 (1892), pp. 644-645, No. 72.

    Francis Walker,
    Characters of undescribed Lepidoptera Heterocera,
    E.W. Janson, London, 1869, p. 75, No. 26.


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    (updated 24 July 2013, 9 August 2018)