holocene_matt's Identifications

Heortia vitessoides?

First image is 1:1 magnification of early instars, second image is not magnified at the same age.
Have been completely defoliating a 14ft Phaleria clerodendron tree each time it regrows its leaves for nearly 2 years.
Caterpillars form “nests” among curled leaves, create long silk “drop threads” and are in astonishing numbers.