32 
CORN AND GRASS. 
Hessian Fly. Cecidomyia destructor , Say. 
7 . 
1, Barley stem elbowed down by Hessian Fly attack ; 2, showing position of 
“flax-seeds.” Also “flax-seeds” or puparia nat. size and magnified, showing the 
early and smooth, and the later or striated, condition. 
From the reports of the past season (joined to those of the previous 
years), since Hessian Fly was first recorded in 1886 to be present as a 
crop pest in this country, the infestation appears to be distributed at 
localities in most of the English counties excepting the most westerly 
and south-westerly, but at the same time so far as the reports sent to 
myself show, the injury caused is for the most part what is described 
by various of the English observers as “ immaterial,” “ slight,” or of 
“ no consequence,” a “ trace ” and so on. 
The highest estimate of damage sent, and this only from one 
locality was in Barley, two stalks in well grown crop, and ten in 
shortish crop in square yard; in Wheat from two to five stalks. 
From Scotland, whilst notes were sent of non-observation of the 
attack at various localities, I had only at the most two of its presence, 
and one of these mentioned the mischief locally as “very consider¬ 
able,” the only note sent of serious injury. 
As this attack still continues to be of considerable interest, I give 
the following notes in the order of date, and in the words of the senders 
(so as to convey the precise information sent), and append remarks 
on some points on which information up to date is desirable, more 
