There has been great debate over the years as to how many species of "Snout" are in the US. Personally I think only one, but some still argue for more. However, there are two very different-looking and easily recognized types (yours is the eastern type). The problem is that there are intermediates in the middle (roughly e. Texas and the southern Plains), and everywhere there are odd-ball individuals that pop up. I'm not sure from where each name was described, but the eastern ones have been traditionally called "bachmanii" and the western ones "larvata". It is mostly agreed now that these represent regional subspecies of the wide-ranging American L. carinenta. However, there is also the name "streckeri" which is being applied to material from southern Arizona and norwestern Mexico (probably California too?). To me, it looks the same as what I've always thought was "larvata". There are nice examples of both basic types on BugGuide. They differ mainly in arrangement the large white spot(s) near the middle of the front margin of the front wing. There are some average differences in orange markings too, but generally the pattern is quite varied, especially below, so it's hard to pin down any other constant difference.

eastern type:

western type: