release is sufficient to treat most rooms. Close the room before spraying 

 and keep it closed for 15 minutes afterwards. These sprays are called space 

 sprays because they kill insects that are moving about in the room. 



DDT applied to surfaces will kill mosquitoes that light there for the next 

 3 or 4 months. For such residual treatments use a compressed-air sprayer. 

 Apply a coarse, wet spray to the walls and ceiling of the room and to the 

 places where mosquitoes may hide, such as behind pictures, under furniture, 

 and in closets. However, do not spray surfaces that might be soiled by the 

 treatment. 



HOW TO PROTECT YOURSELF AGAINST 

 MOSQUITO BITES 



Use Screens or Bed Nets 



Well-fitted screens will keep most mosquitoes and other flying insects 

 out of houses. Screens made of 16-mesh wire cloth are generally satis- 

 factory. Yellow-fever mosquitoes, however, can get through these screens. 

 You can keep them out by applying screen enamel to 16-mesh screen or 

 using 18-mesh wire cloth. In humid climates screens of copper, bronze, or 

 other rust-resisting alloy are most durable : in dry climates those of galvanized 

 or painted wire are satisfactory. Full-length window screens give better 

 protection than half screens or those inserted under the sash. Screen doors 

 should open outward. It may also be necessary to screen the vents to 

 fireplaces and other openings into homes. 



In unscreened or poorly screened houses or for sleeping out of doors 

 a bed net gives much protection. Keep it free from holes and tuck the 

 edges under the mattress. For added protection spray the bed net with 

 a mosquito repellent or a 5-percent DDT solution. 



Use a Repellent 



A repellent applied to the skin or clothing will protect you from mosquito 

 bites for a few hours. The most common repellents contain Indalone, 

 dimethyl phthalate, or Repellent 6-12. or a mixture of these materials. 

 For best all-round protection massage the exposed parts of the body lightly 

 with the repellent and spray the outer garments with it. 



NT PRINTING OFFICE: 1951 



For sale by the Superintendent of Documents, t". S. Government Printing Office 

 Washington 25, D. C. - Price 10 cents 



