White spotted sawyer beetle
The white spotted sawyer beetle is a long horned wood boring beetle with a taste for stressed and dying pine trees that are fire-scorched, have been struck by lightning, are worn down from injury by other insects, and/or are drought-stressed. Their white grubs eat through the sapwood and heartwood creating extensive burrows.
A similarly spotted black and white beetle with a glossy shell may be an Asian or citrus longhorned beetle, exotic pests having very different life habits from our native spotted sawyer-- they attack healthy trees and do cause serious damage. If you see a glossy one, please report it to your extension agency as quickly as possible.
White spotted sawyer beetle or Monochamus maculosus