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Oncometopia sp.
Cicadellidae, Cicadellinae, Proconiini, Oncometopia sp., female. Unfortunately there are too many species around.
The white things are brochosomes.
http://www.inhs.uiuc.edu/~rakitov/brocho...
http://en.wikipedia.org/wiki/Brochosome
To my knowledge only the female sharpshooters store the brochosomes as a single "chalky" spot for egg protection.
Thanks Cindy and Jared for the reply. I saw one with these white balls. I thought it was some disease in the wings.
The female Oncometopia nigricans has the same chalky spots. Not sure if it is the same species.
Sckel, I'm not sure. I have video of one making the spots. It appears that it secreted the liquid and wiped it on its wings using its legs. http://www.projectnoah.org/spottings/232...