|Photo by Debbie Bird. 11/16/2012
I'll let Carl 'Bug Man' Olson put the bug in your ear:
That's a nymph of what is commonly called a stink bug, Family Pentatomidae, Order Hemiptera. Juveniles are really difficult because many change so radically from the adult look. It is an herbivore typically, although there are some that are predators. They all have scent glands, and if you look at yours you'll see two dark areas on abdomen and those are glands that produce some very noxious chemicals as defense. You know it's a nymph because wings are in the bud stage on yours.
Don't eat these!