northern form, Bundaberg, Queensland,
(Specimen: courtesy of the Macleay Museum, University of Sydney)

The head, thorax, and wings of the adult moth are usually basically white. The forewings each have a red and black line along the costa, and one or more black lines along the wing. The hindwings have a number of black spots, which may extend into each other in southern forms. The abdomen is usually red or yellow, with a black mark on top of each segment. The wingspan is 4 to 5 cms. The markings on the wings are quite variable. The red in the costal lines of the forewings can be orange or yellow.

southern form
(Photo: courtesy of Peter Marriott, Moths of Victoria - Part 2)

Southern forms often have extra straight black lines radiating from the base.

southern form, drawing by Edward Donovan, listed as Bombyx marginata,
An Epitome of the Natural History of the Insects of New Holland, New Zealand, New Guinea, Otaheite and other Islands in the Indian, Southern and Pacific Oceans,
London (1803), Plate p. 154, fig 2,
courtesy of Göttinger Digitalisierungszentrum

Northern forms tend to have reduced black markings.

northern form
(Photo: Don Herbison-Evans, Bundaberg, Queensland)

The female moths can evert a bunch of yellow hairs from the posterior, probably to disperse pheromones to 'call' a mate.

female moth 'calling'
(Photo: courtesy of Anne Guy, Kootingal, New South Wales)

The species is found over most of Australia, including:

underside
(Photo: courtesy of Graeme Cocks, Townsville, Queensland)

A form of this moth described as Amsacta eurymochla Turner, 1926, which may be a synonym, occurs also in

Further reading :

David Carter,
Butterflies and Moths,
Collins Eyewitness Handbooks, Sydney 1992, p. 273.

Ian F.B. Common,
Moths of Australia,
Melbourne University Press, 1990, p. 436.

Edward Donovan,
General Illustration of Entomology,
An Epitome of the Natural History of the Insects of New Holland, New Zealand, New Guinea, Otaheite and other Islands in the Indian, Southern and Pacific Oceans,
London (1803), p. 156. and also Plate p. 154.

Peter Hendry,
The Australian Arctiid Moths (Lepidoptera: Noctuoidea: Erebidae) with emphasis on Creatonotos Gangis,
Metamorphosis Australia,
Issue 65 (June 2012), pp. 6-7,
Butterflies and Other Invertebrates Club.

Peter Marriott,
Moths of Victoria - Part 2,
Tiger Moths and Allies - NOCTUOIDEA (A),
Entomological Society of Victoria, 2009, pp. 28-29,.

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(updated 26 April 2013, 16 July 2023)