Nature Done Wright

I wrote:

After I saw a Spotted Lanternfly at High Mountain last week, I started giving unusual insects a second look.

Saw this guy near the house. I think I know what it is, and I wish I'd killed it (or at least tried to).

I post this in part as a warning to be on the lookout for strange bugs.

What is it, and why is it bad?

Diane Louie offered the correct answer: "It is a Locust Borer which feeds on Black Locust and can cause serious damage or death to the tree."

(Thanks, Diane!)