The Asian Longhorn Beetle. Females bore holes in tree trunks. Larvae grow inside the tree and consume the wood. An infested tree may be covered with pits and surrounded by piles of coarse sawdust. Cut the tree open, and you'll see large tunnels crisscrossing the wood.
Infested trees are sure to die.
They probably arrived in the U.S. inside the wood of shipping containers. It's impossible to control the beetles with pesticides, because the young are deposited so deeply within each tree. To curb the beetle's spread, thousands of hardwood trees have been uprooted and incinerated. Other likely locations would be towns and cities near major international shipping ports. With thanks to The National Science Foundation, we're Block and Byrd for Earth and Sky.