My gut feeling is that T. inyo is just a regional variant of T. cyaneipennis from mountains around the Owens Valley, and how you define it (species or subspecies, or less) probably comes down to how you define a species. I don't know the Sierran insects well, so don't have a strong opinion yet. In addition, there are T. fratercula (yellow wings, east side of the Rockies), T. arizonensis (blue; from the Mojave), T. leucophaea (blue; from the Sierra Nevada), T. bernardi (yellow; from the San Bernardino Mts and probably the San Gabriels). I suspect that T. inyo is just an intermediate between T. "bernardi" and T. "leucophaea", and that all of the above are biologically one variable species. Our green New Mexican ones are in a large blend zone that reaches across the state, with yellow in the north east, blue in the extreme west, and everything in between tending to be some shade of green (but mostly called T. cyaneipennis due to the bluish underside and blue tibia). While I'm on a role, these are also closely related to, but different from T. sparsa, T. verruculata, and at least part of what is now called T. gracilis. To go one step further, I would put these into Circotettix as perhaps a subgenus, since these show very close similarity to that genus both in cytology and morphology. However, suffice it to say here that they are a closely knit group of related (and noisy) species. But, this is getting pretty deep, so I'll stop there.

Thanks. My motivation for the question did not arise from my recent trip to the Sierras, but from a specimen that I collected about a year ago in the San Jacintos much further south. I have it IDed as cyaneipennis- which your comments convince me to maintain as the ID. It much resembles the color in this photo. My only other experience with cyaneipennis (I'm a relative newbie to the Oedipodines) is from the Santa Ritas in Arizona. These were very blue, to the degree that until I got a good look at them, I thought I was seeing Leprus intermedius. I guess I'm only now realizing just how variable this species can be.