Li:Tn:k oi- transmittal. 



U. S. Department of Agriculture, 



Bureau of Entomology, 

 Washington, D. C, August 5, 1910 . 



8ii{; 1 have tlu> honor to transmit herewith, for pubhcation as Bul- 

 letin No. 58, five papers dealing with insects injurious to forests and 

 forest products. These jiapors were issued separately during the 

 years 1906 to 1909. 



Part I, ''The Locust Borer," by A. U. Hopkins, comprises a sum- 

 mary of information from pubhshed accounts, supj)lemented by data 

 secured by recent investigations, and deals more particularly with 

 practical methods for controlling tliis, our most important enemy of 

 the black locust. It is designed to be of service to owners of planta- 

 tions and forests, as well as to investigators, in the prevention of 

 injuries to tliis useful tree. 



Part II, "The Western Pine-destroying Barkbeetle," by J. L. 

 Webb, has special reference to the results of investigations by Mr. 

 Webb in central Idaho in 1905, but relates also to the results of other 

 investigations and to available information on the insect and methods 

 of controlling it. 



Part III, ''Additional Data on the Locust Borer," by A. D. Hop- 

 kins, comprises a partial revision of Part I and gives additional infor- 

 mation based on the results of investigations carried on since that 

 part was issued. 



Part IV, ''The Southern Pine Sawyer," by J- L. Webb, gives the 

 results of special investigations by Mr. Webb and relates to a sub- 

 ject of much economic imj)ortance to the timber interests of the 

 Southern States, and especially of sections in which the pine timber 

 is damaged l)y storms. The results of these investigations and the 

 information contained in this paj)er make it possible to avoid a large 

 percentage of tlu; losses from damage by the sawyer, which hav(» here- 

 tofore seemed inevitable. 



Part V, " Insect Dej^redations in North American Forests and Prac- 

 tical Methods of Prevention and Control," by A. D. Hopkins, gives a 

 summary of facts, conclusions, and estimates relating to the forest- 

 insect problem as apj)lied to North American conditions and calls 

 attention to its importance in the future management of i)rivate, 



III 



