1899.] WATER BEETLE AND CHEESE FLY 125 



information about Cheese-fly maggot attack, just precisely 

 what I was wishing for, and also something of the principle 

 of prevention. Mr. Ward [Organising Secretary of the 

 Cheshire County Council] was kind enough to procure me 

 some good information from Miss Forster [of the Cheshire 

 Dairy School], and I hope to form a good paper by and by. 

 All I really want now in this matter are a few of the "hop- 

 ping " maggots, which most likely will turn up soon. 

 Curiously enough, just at the time, I had an application 

 from a bacon-curing Co. and I think we have on both 

 sides benefited. 



i, Fly ; 2, pupa ; 3, pupa-case ; 4, maggot all magnified, 

 with lines showing natural length ; 5, tail extremity, still 

 more magnified, showing spiracles, tracheae, and caudal 

 tubercles. 



FIG. 12. CHEESE AND BACON FLY, PIOPHILA CASE/, LINN. 



August 5, 1899. 



I now, with many thanks for the clearness with which you 

 have been good enough to note precisely the form of the 

 presentation labels, enclose twelve, only altering by adding 

 to the slips for the three boys, the prefix of " Mr." I am 

 sure they will like it. I fancy I see them surreptitiously 

 turning to the donatory slip, to enjoy their rise ! Very 

 many thanks to you indeed. I hope it may give the 

 recipients pleasure, but I am very sure you give great 

 pleasure to myself by allowing my little remembrance to 

 these kind helpers. 



I am sure you will be interested to know that the Meat 



