Nacaduba cyanea (Cramer, [1775])
Tailed Green Banded Blue
(also known as Thysonotis cyanea)
POLYOMMATINI ,   POLYOMMATINAE ,   LYCAENIDAE ,   PAPILIONOIDEA
  
Don Herbison-Evans,
(donherbisonevans@outlook.com)
and
Stella Crossley

Nacaduba cyanea
Male
(Specimen: courtesy of the Macleay Museum, University of Sydney)

This Caterpillar is bright green with pale brown head. It feeds on :

  • Matchbox Bean ( Entada phaseoloides, MIMOSACEAE ).

    The caterpillar is always attended by ants from the genus

  • Anonychomyrma ( DOLICHODERINAE ).

    The pupa is brown with dark markings.

    Nacaduba cyanea
    Male, underside
    (Specimen: courtesy of the Macleay Museum, University of Sydney)

    The male adults are blue with a dark brown edge around each wing. The hindwings have a pale blue or even white patch across them, and each hindwing has a tail near the tornus.

    Nacaduba cyanea
    Female
    (Specimen: courtesy of the Macleay Museum, University of Sydney)

    The females are white with a broad black border around each wing, and with a row of blue edged black spots along the inner margin of each hindwing

    Nacaduba cyanea
    Female, underside
    (Specimen: courtesy of the Macleay Museum, University of Sydney)

    Underneath, both sexes are similar, with white forewings having a wide dark brown edge. The wings underneath are white with wide black margins, and a row of black spots along the inner margin of each hindwing, each spot surrounded by an iridescent green ring. The butterflies have a wing span of about 3 cms.

    The eggs are white, round, and flattened, with a finely pitted surface. They are laid singly on tendrils and young growth of a foodplant.

    The species occurs as various races in

  • New Guinea and adjacent islands,

    and the north-east coastal areas of Australia, including :

  • arinia (Oberthür, 1878) in northern Queensland.


    Further reading :

    Michael F. Braby,
    Butterflies of Australia, CSIRO Publishing, Melbourne 2000, vol. 2, pp. 786-787.

    Pieter Cramer,
    Uitlandsche kapellen voorkomende in de drie waereld-deelen,
    Amsterdam Baalde, Volume 1 (1775), p. 120, figs. C, D, and also Plate 76, figs. C, D.


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    (updated 13 May 2008, 17 November 2013)