I'm going to go ahead and put this with Melanoplus yarrowii. I've never seen a nymph of M. bivittatus that looks quite like this, and it looks just like what I would expect a nymph of M. yarrowii to look like. We may end up discovering I goofed later on down the road, but there are several things about it that make me pretty sure I'm correct.

Moved from Grasshoppers.

however, it could also be Melanoplus yarrowii. I don't know how the nymphs of that species are colored, but the structure of the two species is very similar, and this one is old enough to tell it has to be in that group (the fact that it is a male helps a lot - you can see the end of the abdomen and shape of the cerci well). M. differentialis is very similar too, but the nymphs usually (?always) show the dark herring-bone pattern on the hind femora, and this one does not. I would say that which ever species is more common in your area (M. yarrowii or M. bivittatus), that is probably the one it is. I might add that, usually, M. bivittatus has dark on the upper half of the outside of the hind femur at this age, and again, this one does not (or just barely anyway).

Moved from ID Request.