Insect (yellow, black and white variations)

I find these insects in the hills Buket Rata, Lhokseumawe, Aceh. I saw him perched on a flower, I think she liked flowers. These insects disturbed by my arrival, when I took a photo of him shifted to the foliage.
These insects are flying low. Has a yellow, black and white variations color.

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Taken with the smartphone camera of Xiaomi Redmi Pro, additional macro lens. Habitat of Aceh natural, Sumatra.