|
These Caterpillars live and pupate in a silken case.
Initially the case has sparse bits of debris attached to it.
|
early instar, magnified
(Photo: courtesy of Andy Doldissen, Sydney, New South Wales)
|
Later it develops several longitudinal ribs,
and becomes quite bare, unlike many other
species in PSYCHIDAE which cover their
case in pieces of vegetation.
|
|
(Photo: courtesy of
Bruce Anstee,
Riverstone, New South Wales)
|
The caterpillars normally only protrude the head and
thorax,
which have a hard orange and dark blue skin,
from their case.
|
The abdomen is greyish and soft,
so they normally keep that inside the protective case.
caterpillar or perhaps a flightless female inside its cut open case
|
The caterpillars have been found feeding on:
Gum Trees ( Eucalyptus,
MYRTACEAE ).
The case can grow to a length of up to 4 cms.
|
(Photo: courtesy of Merlin Crossley, Melbourne, Victoria)
|
When metamorphosis is complete, the male extrudes the pupa
from the posterior end of the case in order to emerge.
male adult
(Photo: courtesy of Merlin Crossley, Melbourne, Victoria)
The male has a hairy black or brown head and body,
with a fringe of pale hairs around the head
and a tuft of yellow hairs on the tip of the abdomen.
The forewings are transparent and the hindwings are
variously blue, black or brown.
The wingspan is about 2.5 cms.
male adult
Photo: courtesy of Buck Richardson, from
Tropical Queensland Wildlife from Dusk to Dawn Science and Art
The female is wingless,
with a tiny head and thorax.
She stays within her case for fertilisation,
and lays her eggs within the case.
pupa or mummified female
When the eggs hatch, the small caterpillars move to the outside
of the case and onto the food plant. Though only about 3mm long,
these small caterpillars each have a small conical case,
which they hold perpendicular to the surface they are on.
male adult
(Photo: courtesy of
Ian McMillan,
Imbil, Queensland)
The species is found in
Northern Territory,
Queensland,
New South Wales,
Australian Capital Territory,
Victoria,
Tasmania,
South Australia, and
Western Australia.
drawing by John O. Westwood,
Descriptions of some species of Lepidopterous insects belonging to the genus Oiketicus,
Proceedings of the Zoological Society of London,
Volume 22 (1854), Plate Annulosa XXXVII, fig. 3,
image courtesy of Biodiversity Heritage Library,
digitized by
Natural History Museum Library, London.
Further reading :
Ian F.B. Common,
Moths of Australia,
Melbourne University Press, 1990, p. 180.
Edward Doubleday,
Descriptions of some new Australian lepidopterous insects,
in E.J. Eyre (ed.) :
Journals of Expeditions of Discovery into Central Australia and Overland from Adelaide to King George's Sound in the Years 1840-1; sent by the colonists of South Australia, with the sanction and support of the Government: including an account of the manners and customs of the Aborigines and the state of their relations with Europeans,
London : T. & W. Boone Vol. 1 (1845), p. 437, Plate 5, fig.1.
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. 41.
Edward Meyrick & Oswald B. Lower,
Revision of the Australian Psychidae,
Transactions of the Royal Society of South Australia,
Volume 31 (1907), p. 194.
John O. Westwood,
Descriptions of some species of Lepidopterous insects belonging to the genus Oiketicus,
Proceedings of the Zoological Society of London,
Volume 22 (1854), p. 232, and also
Plate 37, fig. 3.
Buck Richardson,
Tropical Queensland Wildlife from Dusk to Dawn Science and Art,
LeapFrogOz, Kuranda, 2015, p. 184.
Paul Zborowski and Ted Edwards,
A Guide to Australian Moths,
CSIRO Publishing, 2007, p. 48.
(updated 25 October 2010, 25 July 2024)
