FARM DAIRYING 



Dr. Howard, entomologist of the United States 

 Department of Agriculture, has found that each 

 female lays about 120 eggs, which hatch in eight 

 hours, the larva period lasting five days and the 

 pupa five days, making the total time needed for 

 the development of a generation just ten days. A 

 big fly has always been a big fly, and a little fly can 

 never grow to be a big fly — and just as soon as 

 they have emerged from the pupa stage they can 

 begin laying eggs. Under favorable conditions a 

 single pair of flies are capable of breeding 74, 473,- 

 197,068,800,000,000,000 of their kind in a single 

 season. Thanks to the birds and other agencies, 

 flies are kept somewhat in check. 



It is almost impossible to keep flies out of the 

 kitchen, milk-room, and cow-stable, but we can 

 greatly lessen their entrance by having the win- 

 dows and doors screened. 



Do not feed the flies, by leaving dirty dishes and 

 pails around. 



We must learn to regard them as one of our 

 most deadly enemies. 



The fly, with the mosquito, is doomed to exter- 

 mination on the common ground that both are 

 danc/erous to human life. 



[279] 



