A few years back I was in the Glass "Mountains" of Oklahoma, and I found areas there where M. differentialis and M. ponderosus were clearly hybridizing and intergrading. Many of the specimens I found there looked much like this one. I didn't have a working camera that day, but I did collect a small series specimens, and may eventually get around to posting some photos of those.

but it is odd, and doesn't look like a normal Differential Grasshopper. I'm going to put it off in this category so it is easy to find and for others to have a look at. It is possible that it's a species I don't know yet. It also somewhat resembles M. eumera, which I doubt occurs so far east (?). And, the thought that it might be M. differentialis crossed with something like M. ponderosus doesn't seem too far-fetched.

Moved from Differential Grasshopper.

Moved from Spur-throated Grasshoppers.

This is speculation, but if M. ponderosae and M. differentialis got together and made babies, this is what I would imagine them to look like. The two species do seem closely related.

I can't really see the cerci, which would help, but this appears to be this species, just with somewhat unusual markings. There is a black form (most common in Wyoming and Colorado), in which the hind femur is patterned somewhat like on this one (but everything else is black), so it's not totally "off" for the species. A pretty hopper and a nice shot.