—a 
1 U.S. DEPARTMENT OF AGRICULTURE. 
DEVES:ION-: OF EN LOMO LOGY. 
BULLETIN No. 21. 
(Revised Edition.) 
Pee be Gn). 
OF A 
gerere tO. Abr SPA LEA 
MADE UNDER DIRECTION OF THE ENTOMOLOGIST 
rO ENVESTIGATE THE 
Narurat ENEMIES oF THE F LUTED SCALE. 
ALBERT KOEBELE. 
(PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE.) 
——_._+—_—> > -—_____— 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1890. 
