White pine insects 



Imperial moth, Basil on a im])( ri.ilis Druiy 



1 Side view of ncarh tnll i^frown lar\ a 



Pine bark aphid, C li i r m c s p i n i c o r I i c i s l-'itch 



2 Masses on tlic su-ni ot a youn*^ |)inc 



White pine weevil, I'issodcs strobi Peck 



3 Pupal cells inulcr bark of pine lo'^- 



4 Burrows of larvae in l)ark 



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



holes, the borings of the insect in the 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 



escape and also a few exit holes in the shrunken affected bark 



7 Adult weevil, enlarged 



LeConte's sawfly, Lojiliyrns Iccontei l-'itch 

 S Larvae in resting position on needles, showing below the stubs of 

 devoured foliage 



Pine leaf scale insect, C h I <> n a s p i s pinifoliae Fitch 

 9 Numerous scales on pine needles 



