I had these all over my tomato stems last season. They kinda resemble the pic of Spittlebug in Rodale's "Good Bug/Bad Bug". They are bright green and they hop. The nymphs are not the same as described in the book, though; they are like little prehistoric porcupines, pokey things sticking out all over their tiny little black and brownish bodies. And when I tried to pick them off with my fingers, I do get noticeably poked as if by a small needle. There's no "spittle", as described in the book either, so it is a mystery to me what these things are and how to deal with them. They suck on the stem. The season before last there were a few. Last season, there were a lot more, and I didn't plant in the same area. They just found the plants. They also liked my eggplants. What are these things and how do I get rid of them?