Ptilomacra senex Walker, 1855
(one synonym: Pachyphlebius thoracicus Felder, 1874)
COSSINAE,   COSSIDAE,   COSSOIDEA
 
Don Herbison-Evans
(donherbisonevans@yahoo.com)
and
Stella Crossley

Ptilomacra senex
(Photo: courtesy of Anne Powell, Taylors Beach, New South Wales)

These Caterpillars bore into and live inside the stems of :

  • Grass Trees ( Xanthorrhoea, ASPHODELACEAE ).

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

    The adult moths have a pattern of light and dark fawn on the wings. They have a wingspan of about 10 cms.

    Ptilomacra senex
    (Specimen: courtesy of the Macleay Museum, University of Sydney)

    The eggs are black and ellipsoidal. They are laid in circular spiral piles around stem of a foodplant, with the long axes pointing radially.

    Ptilomacra senex
    eggs
    (Photo: courtesy of Peter Crowcroft, Anglesea, Victoria)

    The species occurs in the south-east quarter of mainland Australia, including:

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

    Ptilomacra senex
    male
    drawing by by E.H. Zeck, listed as Culama rubiginosa,

    in Walter W. Froggatt: Forest insects of Australia, Sydney 1923, Frontispiece, fig. 4,
    image courtesy of Biodiversity Heritage Library, digitized by NCSU Libraries.


    Further reading :

    Ian F.B. Common,
    Moths of Australia, Melbourne University Press, 1990, fig. 26.4, p. 270.

    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. 67.

    Francis Walker,
    Catalogue of Lepidoptera Heterocera,
    List of the Specimens of Lepidopterous Insects in the Collection of the British Museum,
    Part 5 (1855), p. 1098, No. 1.


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    (updated 23 July 2010, 31 January 2019, 2 June 2020)