130 New Disease in Wheat. 



Mr. Frederick Heisz mentioned at the Society, at 

 the meeting of January 12th 1808, that his wheat suf- 

 fered extremely last autumn, during a drought, from 

 insects having a great resemblance to those of the hu- 

 man head; several of which w^ere found in the main 

 stalk of the plant, just as it left the earth. The gro\^i;h 

 of the wheat was checked, and the leaves turned yellow- 

 A similar disease prevailed in several places in his 

 neighbourhood, viz. in the county of Philadelphia, 11 

 miles up the Wissahickon road. 



