Mesembrius is a genus of hoverflies. Wikipedia
Wasp-mimicking Hover Fly is bright yellow in colour with black stripes. There are three conspicuous black on thorax. The abdomen is banded with black and yellow. On the 2nd segment the black bands are joined by a median band. The wings are smoked in pale brown. BrisbaneInsect
Spotted at Dairy Farm Nature Park – January 2021