This is a very common species which occurs on many Eucalyptus species. Both the caterpillars and the adults eat Eucalyptus leaves.
Classification
from Australian Faunal Directory
Order Coleoptera - Beetles, 24955 named species in Australia
Family Chrysomelidae - leaf beetles, about 2455 named species in Australia
Subfamily Chrysomelinae - 700 named species in Australia
Genus Paropsisterna - 122 named species in Australia
Species Paropsisterna variicollis (Variable Eucalyptus Leaf Beetle)