Smush, Squash, Smash and don't feel guilty. They're only going to get worse as the summer continues. This unwelcome insect threatons gardens, bushes, trees.
...You are likely witnessing the wake-up routine for something we, here in Maine, affectionately call 'snow fleas' (even though they're not fleas at all.)
DEET will usually keep them away, but if you are looking for an alternative way to keep them off, here are a few ideas, including one from a New Hampshire Tattoo Company.