1. Also called flatheaded apple tree borer . the larva of a metallic wood-boring beetle, Chrysobothris femorata, that bores into the wood of apple and other fruit trees.
2. Also called roundheaded apple tree borer . the larva of a long-horned beetle, Saperda candida, that bores into the wood of apple and other fruit trees.
[ 1830-40, Amer. ]