This little beauty is one of the iconic beetles of my part of the US:
Ah, Moneilema gigas. What a stunning creature. This longhorn beetle eats cactus, prickly pear and cholla mostly, hence its name. It’s also got one heck of a powerful jaw. And, I have witnessed (though not experienced) this myself: if one of these gets hold of a finger with that strong little mouth, you’re just going to have to take it for a while. They really don’t like to let go!