Hypochrysops byzos (Boisduval, 1832)
Yellow Jewel
LUCIINI,   THECLINAE,   LYCAENIDAE,   PAPILIONOIDEA
  
Don Herbison-Evans
(donherbisonevans@yahoo.com)
and
Stella Crossley

Hypochrysops byzos
(Photo: courtesy of Bob Miller and Ian Hill)

The Caterpillar of this species is flattened and has a corrugated appearance. It is coloured green with a pale dorsal band and darker mottled markings. It usually rests on a silk pad on a leaf of its foodplant.

Hypochrysops byzos
(Photo: courtesy of Bob Miller and Ian Hill)

The caterpillar has been found feeding on plants in STERCULIACEAE such as

  • Grey Rulingia ( Commersonia salviifolia ), and
  • Brush Kurrajong ( Commersonia fraseri),

    as well as various Pomaderris species in RHAMNACEAE such as

  • Hazel Pomaderris ( Pomaderris aspera ),
  • Cotoneaster Pomaderris ( Pomaderris cotoneaster ),
  • Oval Pomaderris ( Pomaderris elliptica ),
  • Rusty Pomaderris ( Pomaderris ferruginea ),
  • Middle Pomaderris ( Pomaderris intermedia ).

    Hypochrysops byzos Hypochrysops byzos
    pupa
    (Photos: courtesy of Bob Miller and Ian Hill)

    The caterpillar pupates under a leaf of its food plant. The pupa is rounded, green, and spotty, and about 1.3 cms. long.

    Hypochrysops byzos
    male
    (Photo: courtesy of Bob Miller and Ian Hill)

    The adult males are metallic blue on top with black wing margins. They have two small orange spots on the tail of each hind wing.

    Hypochrysops byzos
    female
    (Photo: courtesy of Bob Miller and Ian Hill)

    The adult females are dark brown on top with an orange blotch on each wing.

    Hypochrysops byzos
    male, underside
    (Photo: courtesy of Bob Miller and Ian Hill)

    The undersurfaces of the wings of both sexes are similar: yellow with orange bands outlined in metallic green. The wingspan is about 3 cms.

    Hypochrysops byzos
    egg, highly magnified
    (Photo: courtesy of , Ken Walker, Melbourne, Victoria)

    The eggs of this species are white, round, flattened, ridged, spiky, and pitted. They have a diameter of about 0.8 mm. They are usually laid singly under leaves of a foodplant.

  • The subspecies byzos occurs in
        southern Queensland and New South Wales,
  • The subspecies hecalius Miskin, 1884, is controversial,
       the name being applied to occurrences in Victoria.

    Hypochrysops byzos
    female, underside
    (Photo: courtesy of Bob Miller and Ian Hill)


    Further reading :

    Jean-Baptiste Alphonse Dechauffour de Boisduval,
    Faune Entomologique de L'Ocean Pacifique,
    in M.J. Dumont d'Urville:
    Voyage de Decouvertes de la Corvette l'Astrolabe,
    Division 7, Part 1 : Lepidopteres (1832), p. 81, No. 8..

    Michael F. Braby,
    Butterflies of Australia, CSIRO Publishing, Melbourne 2000, vol. 2, pp. 664-666.

    Frank Jordan & Helen Schwencke,
    Create More Butterflies : a guide to 48 butterflies and their host-plants
    Earthling Enterprises, Brisbane, 2005, pp. 51, 62.


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    (updated 2 July 2008, 23 December 2023)