I found these dark brown eggs in several groups, on both sides of leaves of Citrus, in May 2012.
One group was on a stone wall.
They are ~ 0.8mm long. They have a translucent membranous flap at the end.
I know they are not:
- citrus leaf miner (Phyllocnistis citrella) because that moth lays its eggs singly,
- citrus shield bug (Rhynchocoris humeralis) because they are the wrong shape
I suppose I am not 100% sure they are eggs; they could be communal pupae, perhaps.
Hi Mike... I have been trying to determine if it might be citrus blackflies...the "cases" look to be in a sort of spiral formation and your pic is a wonderful extreme closeup...I am having a hard time finding one that clear to match it against.
Thanks for your thoughts.
Sorry for my belated reply. I thought the system would email me whenever there was an update to one of my postings, but apparently not.
That link is broken now, but I have done some more Googling and I see what you mean.
But I think the eggs are too different for it to be that species (Aleurocanthus woglumi ). However, I note some other species of Aleurocanthus lay their eggs more like mine, so maybe... However, I have found no exact match:(
I also have a feeling it may be within the Hemiptera (where the eggs are variable but often have a 'cap' somewhat like mine), but again I can't find an exact match.