Just saw these yesterday and after checking around, it seems to be one of the Cactus Longhorn Beetle species. They are eating on one prickly pear cactus, mostly the new growth. I went and checked the Cholla Cactus on the front slope of my property that is going to bloom soon...and thankfully, none of them found on that cactus. Should be really beautiful when that cholla blooms, so I didn't want anything to spoil that!
http://www.texasento.net/Monei...
