Several hundred species occur in the United States.
Most species are dark red, brown, or black.
Their antennae are elbowed and the outer segments are enlarged and clublike. When viewed from above, the head is partly or completely hidden by the thorax. A buckshot pattern of holes is apparent on infested branches or on the trunks where the new adults have emerged. Larvae of most species are off-white, robust, grublike, and may have a dark head. Bark Beetles Common to Garden and Landscape.