90 NATURE-STUDY REVIEW [12:2— Feb., 1916 



of cleaning fly specks from windows, woodwork, chandeliers 

 How much do screen doors and windows cost each family a year 

 Tanglefoot paper? Fly poisons? Fly swatters? Fly traps 

 (Fly screens have been estimated to cost the country Si 2,500,000 

 yearly.) 



Plans and Methods of Controlling Flies. Study and discuss with 

 the class all the different devices and plans of campaign used in the 

 community. Which are best? Which possible, and which, 

 impossible to get everybody to unite upon? Can any of them be 

 depended on to get the last pair of flies in the town and the first 

 pair that comes from outside ? 



(a) Plan of Keeping Things Clean. Exactly how must we do 

 this for a town or city home so that flies cannot breed anywhere 

 on the permises ? (House flies have been bred out of the snuff on a 

 druggist's counter. They may breed in rotten lawn clippings, or 

 weeds or in decaying garbage, fruit or vegetables, as well as in the 

 waste of stables or the poultry yard or pigeon loft.) In town or 

 city schools ask each pupil to tell, or write, exatcly what is being 

 done and what each thinks his people ought to do and can do. 

 Is it humanly possible for any town or city to keep, or treat, 

 all fly breeding material so that flies cannot multiply in it ? If not, 

 what must we plan to do? (trap the breeders.) 



(b) Do the same for the farm home and district in a rural 

 community. How can a farm dispose of its barnyard manure 

 so that flies cannot breed in it? (If spread daily it will generally 

 dry out or rot too quickly for eggs to hatch and maggots to develop 

 in it. This plan, too will save handling the material but once 

 and will conserve from half to three-fourths the fertilizer value, 

 compared with the old, filthy way which necessitated piling and 

 allowing to rot. How many farmers in the district get contents 

 of barnyard to the soil daily in warm weather? Has any farm 

 adopted the plan of treating all stable manure with borax ? With 

 hellebore? Even with all stable refuse hauled out, or treated, 

 daily, how may breeding be prevented in pastures and hog lots? 

 and roadsides? (Only by trapping the breeders.) 



(c) Compare in cost, labor and effectiveness all the other 

 plans in the field with that of consistently trapping the breeders, 

 out of doors, about every home and barnyard, wherever they 

 exist; to have in doing this a fly trap that catches all that are 



