I found these dark brown eggs in groups on leaves of some of my citruses today.
I know they are not citrus leaf miner (Phyllocnistis citrella) because that lays its eggs singly, as shown
here.
They are not the eggs of citrus shield bug (Rhynchocoris humeralis, or other species) (wrong shape).
Some were laid on the upper surface, some on the underside. They are ~0.8mm long.
Any ideas?