A sap-sucking insect that mimics a thorn on the branches where it feeds. The females will lay the eggs in the bark of the tree they are feeding after they've mated. When the young hatch she will pierce holes in the bark for her young so they can feed. She remains with them till they reach adulthood. She's the larger green one to right on the second image.
On a flowering bush near a house.
I took a photo of the last of the young to reach the before last molt. It can be seen in this spotting, http://www.projectnoah.org/spottings/124...