Chlorocoma externa (Walker, 1861)
Spotted-fringe Emerald
(previously known as Chlorochroma externa)
GEOMETRINAE ,   GEOMETRIDAE ,   GEOMETROIDEA
 
Don Herbison-Evans
(donherbisonevans@outlook.com)
and
Cathy Young & Stella Crossley


(Photo: copyright Cathy Young)

This Caterpillar is thin and pale green, with the head end extended into two horn-like points with red tips.


(Photo: courtesy of Peter Marriott, Moths of Victoria: Part 4)

The adult moths are green Emeralds, and the wings having a red border. The wings also have a vestigial spot in the middle, unlike those of the Emerald Chlorocoma cadmaria. The wings are rounded, unlike those of the Emerald Chlorocoma tetraspila. The abdomen has a pale dorsal stripe. The wingspan is about 2 cms.


underside
(Photo: courtesy of Peter Marriott, Moths of Victoria: Part 4)

The eggs are round, flattened, and yellow, and covered in minute dimples. They are laid singly.


close-up of eggs
(Photo: copyright Cathy Young)

The species has been found in:

  • Queensland,
  • New South Wales,
  • Victoria,
  • Tasmania,
  • South Australia, and
  • Western Australia.


    Further reading :

    Peter Marriott,
    Moths of Victoria: Part 4,
    Emeralds and Allies - GEOMETROIDEA (B)
    ,
    Entomological Society of Victoria, 2012, pp. 34-35.

    Francis Walker,
    Geometrites,
    List of the Specimens of Lepidopterous Insects in the Collection of the British Museum,
    Part 22 (1861), p. 564, No. 11.


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    (updated 3 November 2011, 18 September 2013)