Gall. "These galls are corky formations about half an inch in diameter and varying from almost round to long galls, some being an inch or more in length. . . . The general position of the larval cell is, as a rule, in a plane almost perpendicular to the long axis of the gall which is the same as the course of the woody portion of the root. They are arranged in an irregular order close to the wood of the root."