Beetle Found by Dog
My dog found this crawling on our patio. It is very strong and it was difficult to hold long enough to get a picture. It is about 2 1/2" long from pincer to tail. The color is brown-black. I live in Phoenix Arizona and was found 4th of July night. The pincers are very menacing looking. The legs were going a mile a minute.
This looks like one of the Longhorns, Derobrachus geminatus, known as the Palo Verde Root Borer. More information can be found on this site.