A bark beetle that increases the value of the wood?
The cedar tree borer, Semanotus ligneus, is a wood boring beetle that attacks most dying conifers, but its preferred host is eastern white cedar. By feeding for two summers on the inner bark and ¼ inch of sapwood, the larvae excavate frass-filled, meandering tunnels or galleries that increase in width. When the bark and frass are removed and these logs are cleaned, their surfaces are covered with beautiful grooves that rustic furniture and log home craftsmen utilize and arrange on visible surfaces of their products. Customers are willing to pay higher prices for such "insect sculptured" wood.
In the early fall of the second summer of larval feeding, these one inch, creamy white, and brown headed wood borers tunnel deeper into the sapwood, change into pupae and then adults which hibernate over winter. They chew their way out through the bark the next spring. Adult cedar borers are ¼ to ½ inch long and are black except for yellow or orange coloration on their outer wing covers. A black, circular spot occurs in the center of each orange area. Long antennae extend from their heads. Females seek and chose dying conifer and then lay eggs in slits cut into the bark .