Hissing Longhorn Beetle...

We had a dead branch that I could see every time I looked out the kitchen window and today I decided it was time to get rid of it.  I used the pruning saw and sawed it off.  Teach took the branch and threw it onto the pile.  As I was sweeping up the messy leaves I saw this beetle scuttle away and I just had to run and get the camera.  I have never seen these before but they are rather cute.