as can be seen from the Bottlebrush twigs used by the caterpillar in the photograph above. Nevertheless, this individual happily accepted leaves of various bipinnate Wattles ( Acacia, MIMOSACEAE ) !

(Photo: courtesy of Angela Braniff, Stromlo, Australian Capital Territory)

The caterpillar inside the case has hard skin on the head and thorax, which has a mottled brown and white pattern. This hard skin protects the caterpillar when these parts are protruded from the case for it to walk and feed. The abdomen which it normally keeps within the case has soft skin and is a murky green or brown, with a row of pale spiracles along each side. The case can grow to a length of up to 3 cms.

(Photo: courtesy of Leonie Kirchmajer, Melbourne, Victoria)

The adult male is black with translucent grey wings. The thorax of the male has four white stripes. It has a wing span of about 2 cms.

(Specimen: courtesy of the The Australian Museum)

The species occurs over the southern half of Australia, including:

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 37, fig. 1,
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, fig. 19.8, p. 179.

John O. Westwood,
Descriptions of some species of Lepidopterous insects belonging to the genus Oiketicus,
Proceedings of The Zoological Society of London,
Part 22 (1854), pp. 231-232. and also Plate 37, fig. 1

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(updated 9 September 2011, 13 November 2023)