Looking at the Diactenis genus on BOLD, only one species is listed:
http://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=364786
Found in some Acacia mearnsii which I had in a container while trying to raise a different caterpillar species on 26/10/2020. Pupa formed around 8/11/2020 and adult emerged on 19/11/2020.