Sinister Moth caterpillar - early instar

Description:

The early instar of caterpillars of this moth are like narrow black twigs. This one was about 10 mm with small white spots between each body segment. It has only two pairs of prolegs (grasping the stem in pic 3) and hence considered a true looper.

Habitat:

Spotted on a young eucalyptus tree - suburban backyard.
Occurrence record: http://bie.ala.org.au/species/Pholodes+s...

Notes:

Larvae feed on several species of plants (reference link) including eucalyptus.
Family: Geometridae
Subfamily: Ennominae
Later instar spotting by Stephen Solomons
http://www.projectnoah.org/spottings/193...
Adult female spotting
http://www.projectnoah.org/spottings/151...