@donhe you would need to see them front on then queenslandica has, “head lightly scaled, white, with a pair of purplish brown dots between the eyes just below the antennal bases: pair of thin purplish brown bars between antennal bases which extend almost to the mid-line; labial palps upturned, white, with purplish brown tips.”
@WendyEM See Peter MavKey's Review of the Australian species of Arctornis Germar, 1810 (Lepidoptera:Erebidae:Lymantriinae), Australian Entomologist, Volume 43, Part 4 (2016), pp. 174-177.