LHTTIiR ol- TR.WSMITTAL 



U. S. Dej'autment of Acatitui/rruK, 



Bi UEAU OF Entomology, 

 \V(is/tii,f/to7t, I), r., August 5, 1910. 



SiJi; 1 have the liuiior to tninsinil herowith, for ])ublication as Bul- 

 letin No. 5S, five papers dealing with insects injurious to forests and 

 forest products. These papers were issued separately during the 

 years 1900 to 1909. 



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

 mary of information from ])u])lislied accounts, suj)i)lcnicnte(l by data 

 secured by recent investigations, and deals more j)articularly with 

 practical methods for controlling this, 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 this useful tree. 



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

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

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

 invcslignlions and to available information on the insect and methods 

 of controlling it. 



Part HI, "Additional Data on the Locust Borer," by A. I). IIoj)- 

 kins, comprises a j)artial revision of Part T and gives additional infor- 

 mation based on the results of investigations carrictl on since that 

 part was issued. 



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

 results of s|)ecial investigations by Mr. Webb and relates to a sub- 

 ject of nuich economic importance to the timber interests of the 

 Soutiicrn States, and esj)ecially of sectit)ns in which the |)ine timber 

 is damaged by stonns. The results of these investigations and the 

 information contained in this paper make it possibh- to avoid a large 

 j)ercentage of the loss(>s from damage by the sawyer, which have here- 

 tofore seemed inevitai)le. 



Part \V Insect I )epre(lal ions in North American Forests and Prac- 

 tical Methods of Prevention and Control," by A. D. Iloj>kins, gives a 

 summary of facts, conclusions, and estinnites r(>lating to the forest- 

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

 attention to its importance in the future management of private, 



III 



