50 WILD LIFE CONSERVATION 



Natural forests and 



forest products, $100,000,000. 



Cereals, 10 per cent, 200,000,000. 



Hay, 10 per cent, 53,000,000. 



Cotton, 10 per cent, 60,000,000. 



Tobacco, 10 per cent, 5,300,000. 



Truck crops, 20 per cent, 53,000,000. 



Sugar, 10 per cent, 5,000,000. 



Fruits, 20 per cent, 27,000,000. 



Farm forests, 10 per cent, 11,000,000. 



Miscellaneous crops, 10 per cent, 5,800,000. 



Total, $520,100,000. 



The losses inflicted by insect pests on forests and 

 forest products were estimated by Dr. A. D. 

 Hopkins, the departmental special agent in charge 

 of forest insect investigations. Every person who 

 will read, or even examine, Dr. Hopkins's writings 

 on his special subject surely will be convinced that 

 of all men in America he is best qualified to speak 

 with authority on that subject. His estimate of 

 $100,000,000 as the annual loss to timber interests 

 covers the losses from insect damages to standing 

 timber, and also to forest products, both crude and 

 manufactured. 



Dr. Hopkins's work on the bark-beetles of North 

 America is, to the layman, a startling revelation. 

 For example, it shows that, leaving all other insects 

 out of consideration, there are seven species of bark- 

 beetles whose depredations cover the whole area of 

 the coniferous forests of the United States. Each 



