:^xplanation of Plate 1}.* 



Fig, 

 I 



Nearly full grown larva of imperial moth, Basilona impcralis Drury. 

 Masses of the pine bark louse, Chcrmcs pinicorticis Fitch. 



3. Pupal cells of white pine weevil, Pissodcs strobi Peck under bark of pine log- 



4. Burrows of larva; of same in bark. 

 Portion of dead shoot killed by the insect, showing the circular exit holes, the 



borings of the insect in upper part and the shrunken area extending down 

 on the affected portion of the twig. 



6. Pupal cells of white pine weevil within the wood, showing method of exit and 



also a few exit holes in the shrunken affected bark. 



7. Adult weevil, PissoHcs strobi Peck, enlarged. 



8. Leconte's sawfly larv;e, Lopliyrus Iccontci Fitch in resting position, showing 



below the stubs of devoured foliage. 



9. Pine leaf scale insect, Chionaspis furfura Fitch. 



* Executed from nature, under the author's direction, by L. H. Joutel. 

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