Timber Moth Caterpillar

A Timber Moth Caterpillar nest. Found only a few kilometers from a previous spotting, although I believe this to be a different species. http://www.projectnoah.org/spottings/274516008 The most noticeable difference is the surface cover of dark fecal pellets. Two nests were found on this tree, and both were covered in the same fecal matter. This was not present on my other spotting. Parts of the surface of this nest was soft to touch, although very gritty, whilst other sections were hard. I'm not to sure how it's all held together, but most likely by a very fine silk. The last photo in the series shows evidence of previous insect boring. Whether it's the same species or not is unknown. PS: Update 17/07/2018. My latest spotting explains the webbing of the nest as 'frass-covered'. Genus also Maroga. https://www.projectnoah.org/spottings/1511812152