Synemon notha Westwood, 1877 Bastard Sun Moth CASTNIIDAE,   SESIOIDEA

Don Herbison-Evans (donherbisonevans@yahoo.com) and Stella Crossley

(Photo: courtesy of CSIRO/BIO Photography Group, Centre for Biodiversity Genomics, University of Guelph)

The adult moth of this species has pale grey-brown forewings each with substantial dark brown markings. The hindwings are dark brown each with two scarlet patches, and a submarginal arc of scarlet spots. The wingspan is about 3 cms.

listed as Synemon notha,
drawing by John O. Westwood, lithographed by P.C. Berjeau, printed by Hanhart,
A monograph of the Lepidopterous genus Castnia and some allied groups,
Transactions of the Linnean Society of London, 2nd Series (Zoology),
Volume 1 (1877), Plate XXXIII, fig. 10,
image courtesy of Biodiversity Heritage Library, digitized by Ernst Mayr Library, Harvard University.

The species has been found in

Western Australia.

listed as Synemon notha
drawing by Strand, lithograph by Hochdanz Co., printed by Werner & Winter, for Seitz
in The Macrolepidoptera of the World, Alfred Kernen Verlag, Volume 10 (1933), Plate 9, fig c2,
image courtesy of Biodiversity Heritage Library, digitized by Natural History Museum Library, London.

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Further reading :

John O. Westwood,
A monograph of the Lepidopterous genus Castnia and some allied groups,
Transactions of the Linnean Society of London, 2nd Series (Zoology),
Volume 1 (1877), p. 197, and also Plate 33, fig. 10.

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(written 22 August 2018, updated 1 October 2026)