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The prothoracic ring, or segment just behind the head, is transversely oblong, being twice as broad as long; there is a pale dorsal corneous transversely oblong shield, being about two-thirds as long as wide, and nearly as long as the four succeeding segments; this plate is smooth, except on the posterior half, which is rough, with the front edge irregular and not extending far down the sides.
The plan of this work precludes a more full consideration of these and other topics connected with the growth and decay of these trees; and I can only add, that it may be prudent to cut down and burn all that are much infested by the borers." It is about one-half an inch in length. The head is one-half as wide as the prothoracic ring, being rather large.
On the under side of each segment are similar rough horny plates, but arcuate in front, with the hinder edge straight. The prothoracic segment is broader and flatter, and the rough portion of the dorsal plates is larger and less tranversely ovate.
During a mild December, they may be found in abundance under sticks and stones, even in situations so far north as Salem, Mass. The segments are inclined to be of unequal size, the prothoracic ring sometimes becoming almost obsolete, and some of the abdominal rings are much smaller than others; while in Lipura and Anura, the lowest forms of the group, the segments are all much alike in size.
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