92 THE CANADIAN ENTOMOLOGIST. 



Wheat, barley and oats have been as productive as common, except 

 where the first named grain was much injured by its old enemy, the insect 

 absurdly called Hessian Fly ; another proof that a cold winter has no 

 influence in destroying that pest. 



Further, in communications in consequence of the request of the 

 Society, on the circumstances attending the season of iSi6. 



P. 200, Joseph Gibbons : Hessian Fly locally in Springfield. 



Delaware Co. : Note by R. Peters. 



P. 204, Henry Cox, London Grove, Pa. : Hessian Fly undisturbed. 



P. 211, Richard J. Jones, Kinnerely, Md. : H. Fly very destructive. 



P. 216, R. K. Meade, Virginia : H. Fly present. 



[All these data are wanting in the chronological table.] 



P. 224-226, a letter by Th. Say containing remarks on the H. Fly. 



P. 236-237, a letter by Th. Say containing remarks on the H. Fly. 

 Vol v., 1826: 



P. 135-137- On the Hessian Fly, by John Linton, April 30, 182 1. 

 Description of a simple machine to brush the field with a branch of a tree 

 to destroy the H. Fly. 



A note on p. iv. of the contents states : " The implement mentioned 

 by Mr. Linton has not been found to answer the purpose intended by it." 



P. 143-153. Some Observations on the Hessian Fly; written in the 

 year 1797 by Dr. Isaac Chapman; read August 14, 1820; at the end a 

 note by Dr. M. (probably Mease). 



This paper is one of the most important, based upon personal observa- 

 tions from 1786 to 1797. It has been used by Harris. The note at the end 

 states that after the observations of Mr. Wortli, there are certainly three 

 annual generations instead of two, as stated by Mr. Chapman. Chap- 

 man's paper should be quoted as belonging to the literature of 1826. 



An anonymous article, " The Hessian Fly," in the Albany Gazette of 

 June, 1799, is reprinted in the Agricultural Museum (by D. Wiley), 

 Georgetown, Ca., 181 1, vol. r, p. 39. 



Memoirs of the Board of Agriculture of the St. of New York, Albany, 

 182 1, vol. i., contains : 



Featherstonaugh, G. W. An essay on the principles and practice of 

 rural economy ; chap, ix., metamorphoses of insects, p. 170, gives a short 

 account of the Hessian Fly, " which has now greatly abated." 



P. 62, a letter from Exc. George Washington, Mount Vernon, 15th 

 July, 1797. 



