Flightless Female Bagworm Moth from Australia

What’s this funny insect?
Location: Sydney, Australia
April 13, 2011 7:03 am
This creature was on the wall the other day. I have never seen anything like it. Any idea what it is? Is it dangerous? The spike on the back looks a bit scary!
Signature: Carey

Bagworm Moth

Dear Carey,
Just a few days ago, we had another identification request for this flightless female moth from Australia, and it was identified as a Bagworm Moth, Cebysa leucotelus.  Only the females are flightless.  We suspect that is an ovipositor protruding from her abdomen.

Female Bagworm Moth

Dear Daniel,
Thank you for that! I hope she laid her eggs outside first.
Carey

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Location: Australia