15 



With regard to the abolition of flies, the best measures will again 

 naturally involve some trouble and expense. In a thickly settled 

 country it will become necessary for some such measure to be gener- 

 ally adopted in order to be perfectly effective, but in an isolated f arm- 



PiG. 8. — Pupa of Culex (at left) and Anopheles (at right). Greatly enlarged (author's 



illustration). 



house the numl>er of house flies may be greatly reduced by individual 

 work. All horse manure accumulating in stables or barns should be 

 collected, if not daily, at least once a week, and should be placed in 

 cither a pit or vault or in a screened inclosure like a closet at the side 

 or end of the stable. This closet should have an outside door from 



Fig. 9. — Common house fly (Musca domestica) : Puparium at left; adult next; larva and 

 enlarged parts at right. Enlarged (author's illustration). 



which horse manure can be shoveled when it is needed for manuring 

 purposes. Each day's or each week's accumulations, after they are 

 shoveled into the closet or pit, should be sprinkled over the surface 

 with chloride of lime, and a barrel of this substance can conveniently 

 be kept in the closet. If this plan be adopted (and these recommen- 



155 



