Prosotas dubiosa (Semper, [1879])
Small Purple Line Blue
(previously known as Lampides dubiosa)
POLYOMMATINI ,   POLYOMMATINAE ,   LYCAENIDAE ,   PAPILIONOIDEA
  
Don Herbison-Evans,
(donherbisonevans@outlook.com)
and
Stella Crossley

Prosotas dubiosa
(Photo: courtesy of Todd Burrows, South Stradbroke Island, Queensland)

This is a humpbacked Caterpillar. It is coloured yellow with brown speckles. It has been found feeding on the flowers and buds of various Australian native plants, including :

  • Tossa Jute ( Cajanus reticulatus, FABACEAE ),
  • Indian Rosewood ( Dalbergia sissoo, FABACEAE ),
  • Laceflower Tree ( Archidendron grandiflorum, MIMOSACEAE ),
  • Earleaf Wattle ( Acacia auriculiformis, MIMOSACEAE ),
  • Clubleaf Wattle ( Acacia hemignosta, MIMOSACEAE ),
  • Black Wattle ( Acacia leiocalyx, MIMOSACEAE ),
  • Sally Wattle ( Acacia mangium, MIMOSACEAE ),
  • Polystacha WattleAcacia polystachya, MIMOSACEAE ),
  • Bramble Wattle ( Acacia victoriae, MIMOSACEAE ),
  • Macadamia Nut ( Macadamia integrifolia, PROTEACEAE ),
  • Woolly Rambutan ( Alectryon tomentosus, SAPINDACEAE ),
  • Tulipwood ( Harpullia pendula, SAPINDACEAE ),

    and of the introduced plants :

  • Siris ( Albizia lebbeck, MIMOSACEAE ),
  • Wild Tamarind ( Leucaena leucocephala, MIMOSACEAE ), and
  • Lichee ( Litchi chinensis, SAPINDACEAE ).

    Prosotas dubiosa
    pupa
    (Photo: courtesy of Todd Burrows, South Stradbroke Island, Queensland)

    The pupa is pale brown with dark brown speckles.

    Prosotas dubiosa
    male and female upper surfaces
    (Photo: courtesy of Yusuke Takanami & Yasuo Seki)

    The males and female adult butterflies are both brown on top with a purple sheen, and have an obscure black spot near the tornus of each hind wing. Underneath, both sexes are fawn with multiple arcs of white dashes. Each hind wing has a black spot under the tornus. The butterflies have a wing span of about 2 cms.

    Prosotas dubiosa
    male
    (Photo: courtesy of Nick Monaghan, Noosa, Queensland)

    The species occurs as several races throughout south-east Asia, including

  • India,
  • Malaysia,
  • Philippines,
  • Thailand,

    and also in Australia in

  • the north of Western Australia,
  • Northern Territory,
  • Queensland,
  • New South Wales, and
  • South Australia.

    Prosotas dubiosa
    (Photo: courtesy of Todd Burrows, South Stradbroke Island, Queensland)


    Further reading :

    Michael F. Braby,
    Butterflies of Australia, CSIRO Publishing, Melbourne 2000, vol. 2, pp. 798-799.

    Gorg Semper,
    Beitrag zur Rhopalocerenfauna von Australien,
    Journal des Museum Godeffroy,
    Volume 5, Heft 14 (1879) p. 159, No. 66.


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    (updated 22 March 2011, 23 November 2013)