HESSIAN FLY. 



19 



mended to put a good log or rail foundation under the stack so as to 

 raise it above the surface." — (W. S.) 



From the various observations of our own Pyralis, Stack Moth, it 

 is shown that attack may continue when once established in a suitable 

 locality of dead fodder, sticks, or rubbish ; and if the infestation occurs 

 to a troublesome amount it would be desirable, besides clearing out all 

 head-quarters such as may be furnished by rubbish beneath the stack, to 

 give attention to similar neighbouring surroundings. Caterpillars that 

 feed amongst masses of old Birch twigs, or in thatch, as well as in old 

 stacks of Clover, hay, or Saintfoin, cannot be very exclusive in their 

 diet, and by care in search, and also in destroying all spoilt outside of 

 the stacks which might prove to be infested when opened, we might 

 save all further attack. 



Hessian Fly. Cecidomyia destructor, Say. 



EC 



Cecidomyia destructor. — 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. 



Hessian Fly attack appeared in some localities in the past year ; 

 but, personally, I had so very few applications on the subject, that 

 altogether these can hardly have amounted to a dozen notices at the 

 very outside. Also a few apparently reliable accounts of presence of this 

 infestation in various districts appeared in various of our agricultural 



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