434 THE CHEESE-fLT. 



and conjectured that it would produce about three 

 quarters and a half of threshed corn from each 

 acre. 



The wheat that was sown early, about the be- 

 ginning of October, was alone affected by this in- 

 sect. The reason was, probably, that the cold at 

 the approach of winter had destroyed all the flies 

 before the late sown wheat had time to spring out 

 of the ground : consequently their eggs could not 

 be laid in this. The fly appears to be perfected in 

 May, or the beginning of June. 



It was conjectured that this might be the Hessian 

 fly, whose depradations in America have been so 

 notorious. If this is the case, Mr. M. is of opinion 

 that a little good English husbandry, by keeping the 

 ground in heart, and thus enabling the wounded 

 shoots to repair themselves by strong lateral ones, 

 will prevent any serious alarms *. 



THE CHEESE-FLY f. 



The larvae of these flies are the troublesome mag- 

 gots found in cheese, so well known to housewives 

 under the name of Hoppers. They proceed from the 

 eggs deposited in the crevices or holes of the cheese 

 by a very common fly, about the tenth of an inch 

 long, and of a dark colour, with whitish wings, each 

 marked with a black rib. 



This maggot is surprisingly strong and vigorous, 



* Linn. Tran. ii. p. 76. tab. 15. 

 f Synonyms-— Musca purtis. £/«».«■»•— Larvae called Hopper?, 



