(Photo: courtesy of Robin Faulkner, Forrestfield, Western Australia)
These Caterpillars have only been found feeding on Hakea species ( PROTEACEAE ) such as
When the caterpillars feed, they are inclined to eat only the top surface layer of a leaf.
The caterpillar lives in a conical case which it covers completely with hairs taken from the undersides of the mature leaves of its food plant. Longer and longer hairs are attached as the cone increases in size. Also a few larger curled pieces of leaf are attached. The case grows to a length of up to 5 cms.
The caterpillar has a chitinous off-white head and thorax, with brown markings, and a soft brown abdomen.
The caterpillar pupates in its case, in voluminous silk padding.
The pupa is dark brown with an orange head and thorax. The pupa is extruded from the case before the adult male moth emerges from the pupa.
The adult male has a black hairy body and transparent wings, with a wingspan of about 3 cms.
The vein pattern of the wings of the male moth is very similar to that of Hyalarcta huebneri, but the markings on the head and thorax of the caterpillar are quite different.
The species has been found in Western Australia.
(written 14 January 2016, updated 8 September 2017)