THE HESSIAN FLY. 43 



1789. 



Reached Saratoga, 200 miles north of its original station; 



very destructive there in 1791 ; continued until 1803, when it 



disappeared. Re-appeared in 1845. Common in the middle 



Atlantic States. 



1790. 



Very common and destructive in the middle Atlantic States of 

 the Union. 



1791. 



Less common in the middle States ; arrived in Delaware in 



vast multitudes. 



1792. 



Destroyed in Delaware an immense quantity of wheat. 



1797. 



Appeared west of the Alleghany Mountains. 



1801. 



First appeared near Richmond, Virginia. 



1802-3 and 1804. 



Very destructive in Virginia. 



1805, 1816. 



Ravages not recorded ; probahly not general or in great excess 



in the United States. Prevalent and destructive in some parts 



of Lower Canada. 



1817. 



Ravages renewed in New York State, Pennsylvania, Maryland 



and Virginia. 



1818, 1819. 

 Noticed in Pennsylvania. 



1820. 



Common in Maryland and Pennsylvania. 



1830-6. 

 Disappeared in Lower Canada. 



1831. 

 Crops much injured in Seneca County, New York. 



