(previously known as Acidalia costaria)
STERRHINAE, GEOMETRIDAE, GEOMETROIDEA
(Photo: courtesy of Steve Williams, Moths of Victoria: Part 3)
These caterpillars are a patchy brown, with a wrinkly skin. They are missing three pairs of prolegs, so walk in a looper fashion. If disturbed on their foodplant, they readily drop to the ground. It is not clear what they prefer to feed on. In captivity they fed on fresh and dead leaves of Eucalyptus mellidora, but did not thrive.
The pupa is brown.
The adult moths are also brown, with complex variable dark patterns on the wings. The costa of each forewing is pale brown, and they are joined by a pale line across the head. The wingspan is about 1.5 cms.
The species has been found in :
Peter B. McQuillan, Jan A. Forrest, David Keane, & Roger Grund,
Caterpillars, moths, and their plants of Southern Australia,
Butterfly Conservation South Australia Inc., Adelaide (2019), p. 104.
Moths of Victoria: Part 3,
Waves & Carpets - GEOMETROIDEA (C),
Entomological Society of Victoria, 2011, pp. 6-7, 10-11.
List of the Specimens of Lepidopterous Insects in the Collection of the British Museum,
Part 26 (1863), p. 1610.
(updated 25 May 2012, 10 June 2018, 20 October 2020, 12 March 2021)