Arhopalus ferus, commonly known as the burnt pine longhorn beetle, is a species of long horn beetle, of the order Coleoptera. It was first described by French entomologist Étienne Mulsant in 1839.
Adult beetles are 8–30 mm long reddish-brown to black, while males are generally smaller and lighter in colour.
The body is elongated and oval, typical for longhorn beetles. The head angles forward, showing most of the mouth parts. The thread-like antennae are half to three-quarters of the body length, longer in males. The prothorax is smoothly curved with no spines, narrower than the elytra. The elytra have four ridges and slightly tapering sides.
