I have some bugs crawling around on my lovely tomatoes and I'd like to know what they are. They look kind of like green aphids, but they move too quickly and they seem to grow/develop to a flying stage where they look somewhat wasp-like. Although I suppose that could be two different bugs. Pics below.

The first two pics are a close-up of the same waspy-looking bug.

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Pictures next of some green unwinged ones.

Here are two more pics of green ones. I tried to adjust the contrast the best I could in one.

And here's the best pic. They're having a little jamboree up and down the branch. If you look closely, you can see one of the browner, winged ones on the bottom side of the branch.

Any idea? How bad are they? I'm going to guess they aren't beneficials. They seem to be growing in numbers. No signs of ladybugs targeting them. I can kill them with my fingers, but unlike aphids, they take evasive maneuvers.