SB 

 818 

 C578 

 ENT 



Issued April 30, 1910. 



U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF ENTOMOLOGY— CIRCULAR No. 121. 



L. O. HOWARD, Entomologist and Chief of Bureau. 



THE OYSTER-SHELL SCALE AND 

 THE SCURFY SCALE. 



A. L. QuAiNTANCE, in Oliarge of Deciduous Fruit 

 Insect Investigations, 



AND 



E. R. Sas^scer, Scientific Assistant. 



oaooa pir T21 10 1 Washington : GovER>K<EN-t wl^fiiftiSitkicE^ t9io 



MAY ■> - 



