Leaf beetle camoflage

These green and pink beetles were prolific on a couple of small planted saplings in a local park. All larval stages were found together with adults and eggs. The beetles appeared very similar to pink leaf galls that infested the tree. The young apical leaves and stems were also pink. Young larvae congregate into groups and remain underneath the leaf that they are eating.
Advanced instars look similar to the Eucalyptus weevil larva (with its remnant fecal trail). http://www.projectnoah.org/spottings/16545252