THE ANNUAL losses from rodent pests in the 

 United States have been estimated as fully 

 $300,000,000. 



About two-thirds of the damage is inflicted by 

 house rats and mice (both introduced from the Old 

 World) and the remainder by native species. 



This enormous waste of resources may be greatly 

 reduced and largely prevented through systematic 

 and organized campaigns against the noxious species. 



The bounty system effects no permanent relief 

 from rodents and is far more costly than the use of 

 poisons. 



The Bureau of Biological Survey has developed 

 and perfected practical methods of extermination 

 which have been successfully applied over wide 

 territory. 



The Bureau cooperates with the public in organ- 

 izing and carrying out systematic campaigns against 

 animal pests and invites correspondence on the 

 subject. 



Protection of their natural enemies is urged as an 

 important aid in controlling rodent pests. 



