Trapezites iacchus (Fabricius, 1775)
Iacchus Skipper
(one synonym : Anisyntoides jacchus)
TRAPEZITINAE,   HESPERIIDAE,   HESPERIOIDEA
  
Don Herbison-Evans
(donherbisonevans@outlook.com)
and
Stella Crossley

Trapezites iacchus
(Photo: courtesy of Wes Jenkinson)

The Caterpillar of this species is greyish brown with a dark dorsal line and a mottled head that has a black line down the middle.

Trapezites iacchus
(Photo: courtesy of Wes Jenkinson)

The caterpillar feeds on various species of Mat-rush ( ASPARAGACEAE ) :

  • Riverine Mat-rush ( Lomandra hystrix ),
  • Spiny Headed Mat-rush ( Lomandra longifolia ), and
  • Many-flowered Mat-rush ( Lomandra multiflora ).

    The caterpillar feeds nocturnally, living by day in a shelter made with leaves at the base of its foodplant.

    Trapezites iacchus
    (Photo: courtesy of Wes Jenkinson)<

    The pupa is brown and naked.

    Trapezites iacchus
    (Photo: courtesy of Graeme Cocks, Townsville, Queensland)

    The adult male and female butterflies are very similar. They are dark brown with a series of translucent white and yellow patches on each forewing. The hind wings each have a central broad yellow band.

    Trapezites iacchus
    (Specimen: courtesy of the Macleay Museum, University of Sydney)

    Underneath, the forewings are orange with brown and white patches. The hindwings underneath are also orange with five white spots outlined in black. The wing span is about 3 cms.

    Trapezites iacchus
    (Photo: courtesy of Nick Monaghan)

    The species occurs in :

  • Queensland, and
  • New South Wales.


    Further reading :

    Michael F. Braby,
    Butterflies of Australia, CSIRO Publishing, Melbourne 2000, vol. 1, p 108.

    Johan Christian Fabricius,
    Historiae Natvralis Favtoribvs,
    Systema Entomologiae (1775), p. 533, No. 389.


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    (updated 19 March 2011, 26 September 2013)