Rough Stink Bug
Brochymena parva (?)
On a Sweet Acacia tree in Peoria, Maricopa Co., Arizona. 23 March 2018.
Pentatomidae -- Stink Bug Family
The principal food of these bugs are other insects such as caterpillars and soft-bodied bugs. There rough, cryptic color and pattern allows them to hide effectively on the bark of trees and shrubs. If their camouflage fails they can emit foul-smelling fluid if disturbed. There are several very similar species of Brochymena stink bugs. In the photo below the long feeding proboscis projects down and slightly back from the head,
