Adult banded alder borer, or California laurel borer, Rosalia funebris.

Adult banded alder borer (= California laurel borer) Rosalia funebris (Cerambycidae) on tree trunk bark, Davis. 1/3x by JKC. Credit: Jack Kelly Clark
Adult banded alder borer, or California laurel borer, Rosalia funebris. Credit: Jack Kelly Clark