Insect and Spider Identification: Unknown invertebrate eggs, Cyprus, 1 by ViolaMike

ViolaMike wrote:
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.

Any clues appreciated!
Mike