MOSQUITOES AXD TlIEfT! EXTERMINATION. 459 



the 'wiggiors' that arc beneath it. Kerosene of a cheap quality, known 

 as high test light fuel oil, is preferable for this purpose. It can usually 

 be bought at eight cents a gallon. If oil of this quality is not avail- 

 able, ordinary kerosene will answer the purpose. It should be applied 

 as often as once in iwo weeks, for by that time the previous applica- 



FiG. 7. Anopheles punctipennis (Female). Three times larger than life. 



tion will have evaporated. A sufficient quantity should be used, in 

 the proportions named, to cover completely any place that may need 

 treatment. 



Any one who is ill with malaria or yellow fever should be carefully 

 protected from mosquitoes, for, should a person be bitten by an Ano- 

 pheles, the malarial mosquito or Stegomyia fasciata, the yellow^ fever 

 mosquito, at this time, there would be great danger that the insects 

 might fly away and bite some one else and thus spread these diseases. 

 Screens for both doors and windows form the best protection against 

 mosquitoes at all times; but it often happens that the insects get into 

 our houses, even though they are thoroughly screened, generally through 

 .some door or window that has l)een left open by mistake, or they may 

 gain an entrance l^y coming down an unused chimney if the flue is 

 ■allowed to remain open during the summer time. A house or a room 

 may be cleared of mosquitoes by burning j)yrethrum powder and allow- 

 ing the smoke, which is not at all offensive to most people, thoroughly 



