Melanophila drummondi (Buprestidae)
flatheaded fir borer
Larvae:Legless, flattened grub having distinctly widened thorax with sclerotized plates top and bottom. White colour.
Damage:Usually invade previously weakened trees. Adult lays eggs in crevices in the bark, but do not enter the tree themselves. Each larva carves its own tunnel, there is no central cavity. Larvae destroys the cambial surface, but do not carry stains as bark beetles do. These larvae may be competitive with bark beetles. Mostly it attacks injured, mistletoe infected, dying, fire-killed and recently felled trees but sometimes it attacks and kills apparently healthy trees, especially on dry sites. Grubholes are flattened oval shape and adult exit holes are elliptical.
The Buprestidae family is the most destructive of the wood-boring group.
References and Links:
EAG: 533; FC: 263-264.