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Fig. 3.—Work of white-pine weevil, showing character of injury, chip cocoons, and pupal cells: a. Vigorous terminal shoot, showing condition of new growth at time pupæ are transforming to adults; b. 3-year-old top, showing how larvæ have migrated from terminal to the 2 and 3 year old internodes; c. chip cocoon and pupal cell, natural size. (Original.)
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