With the single deep cut in the pronotum I'd call it Dissosteira carolina, the Carolina grasshopper. Patterning and coloration can be extremely variable in this species, most likely due to environmental pressures.
Ants are really tough. I don't usually try to ID them past genus without them on a pin. And there are always the weird basal groups that look really waspy. Ah, the wonderful mess that's Hymenopteran taxonomy!