It's a
Leaffooted Bug more info Leaffooted Bugs
Most of the Leptoglossus bugs are plant feeders and are somewhat common but not particularly damaging (the most damaging member of this family is the squash bug in the genus Anasa). The leaffooted bug, Leptoglossus phyllopus, feeds on sunflower seed heads (killing the seeds), tomatoes, potatoes and other vegetables, pecans, and fruit crops such as peaches. They are called leaffooted bugs because the hind tibia is expanded into a leaf-like structure in the adults. Young nymphs have more ordinary-shaped hind legs, but with each molt the tibia becomes wider.
scroll down Except for the squash bug
If it is the squash type, nasty stuff.