Caterpillar/pupae protection structure used by moth in genus- Hemibela

All the Caterpillars in this genus live in a tube. They hollow out a small length of twig and stay protected inside, just poking out the head and thorax to feed. They all feed on:

various species of Gum Trees ( Eucalyptus, MYRTACEAE ).
They grow to a length of about 1 cm., and pupate inside their tube, which they first secure to a flat surface.
The adult moths have wings of various colours, often brown or yellow with red, white and even purple markings. The moths have a wing span of about 1 cm. So far, 13 species have been assigned to this genus. Members of the genus may be found in most of Australia.