INJURIOUS INSECTS OF 1903. 83 



Fixed to Bark: 



a. Flat, or saddle-shaped, or hemispherical dark brown 

 scales. Large scales after mid-summer are brittle 

 and contain only a whitish dust or, empty egg- 

 shells. Wintering forms are small and flattish. 



PLUM LECANIUM. 



Remedies: See Scales, page 124. 



b. Ashy-gray appearance of bark of badly infested trees ; 

 small gray, or black circular scales. 



SAN JOSE SCALE. 



Remedies: See pages 53 and 124. 



c. Mussel-shaped scales, with whitish eggs underneath in 

 winter. 



OYSTER-SHELL BARK LOUSE. 



Remedies: See page 54 and Scales, page 124. 



d. Bark scurfy, with white scales ; purplish eggs under- 

 neath in winter. 



SCURFY BARK LOUSE. 



Remedies: See page 54 under Apple Insects. 



Producing longitudinal slits and eventually oval-shaped scars. 

 BUFFALO TREE HOPPER. 



Remedies: See page 52 under Apple Insects. 



B. Attacking the Leaves: 



I. Feeding in Colonies: 



a. Protected by webs in the forks of branches. 



AMERICAN TENT CATERPILLAR. 



Remedies: See page 63 under Apple Insects. 



