Serangium cf. maculigerum. This species is not listed to occur in Tasmania.
#1. Serangium
Early April 2010
Ulverstone
These mainly feed on whitefly.
Information and identification to genus thanks to Stephen Thorpe.
Photos KE

#2. Mid July 2011
nipaluna/Hobart
Photos KE

#3. Early October 2017
Ulverstone
On Camellia
Photos KE

#4. Early November 2017
Kingston Beach
Photo KE

#5. Mid January 2019
Ulverstone
Photos KE

#6. Early March 2019
Ulverstone
Photos KE

References
Grove S.J., Forster L. G. ,Porch, N. (2021) An illustrated checklist of the insects of Tasmania. Part 1 – Coleoptera (beetles). The Royal Society of Tasmania. Hobart
N A Martin (2016, revised 2017) Citrus whitefly ladybird – Serangium maculigerum. Interesting Insects and other Invertebrates. New Zealand Arthropod Factsheet Series Number 30. ISSN 1179-643X. Accessed https://interestinginsects.landcareresearch.co.nz/taxon/d1f9280c-3690-4755-8172-9ddb1466529e, 2024-05-04.