Small Grass Yellow
(one synonym : Terias casta Lucas, 1892)
COLIADINAE, PIERIDAE, PAPILIONOIDEA
(Photo: courtesy of Wes Jenkinson)
This Caterpillar is green with a yellow line along each side, and a darker green line along the back. It has been found feeding on plants in CAESALPINIACEAE including
as well as plants in MIMOSACEAE such as
The pupa is held by cremaster and girdle to a stem of the food plant. It has a length of about 1.5 cms.
The upper surfaces of the wings of the adult butterfly are yellow with a black band around the edge, and a black dot near the middle. The undersides are yellow with variable brown markings. It has a wingspan of about 3 cms.
The eggs are off-white and spindle shaped, with a height of about 1.2 mm, and a diameter of about 0.3 mm. They are covered in a microscopic lattice, consisting of about 50 columns of 100 or so embossed rectangles. The eggs are laid singly on a foodplant.
This species has been found in
and all over Australia, including
Further reading :
Michael F. Braby,
Butterflies of Australia,
CSIRO Publishing, Melbourne 2000, vol. 1, pp. 302-304.:
General Illustration of Entomology,
An Epitome of the Natural History of the Insects of New Holland, New Zealand, New Guinea, Otaheite and other Islands in the Indian, Southern and Pacific Oceans,
Volume 1 (1805), p. 98, and also Plate on p. 96.
Life history notes on the Small Grass Yellow, Eurema smilax, (Donovan, 1805) Lepidoptera: Pieridae,
Issue 75 (December 2014), pp. 12-14.
Butterflies and Other Invertebrates Club.
Frank Jordan & Helen Schwencke,
Create More Butterflies : a guide to 48 butterflies and their host-plants
Earthling Enterprises, Brisbane, 2005, p. 40.
(updated 25 April 2009, 29 October 2013, 14 April 2015, I January 2016, 16 June 2018, 14 June 2020, 22 September 2021)