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LETTER OF TRANSMITTAL 



U. S. Department of Agriculture, 



Division of Entomology, 

 Washington, D. C, July i, 1901. 

 Sir: I transmit herewith the manuscript of a report by Dr. A. D. 

 Hopkins, entomologist of the West Virginia Agricultural Experiment 

 Station, on a trip taken in the summer of 1900, under the auspices of 

 this Division, to the spruce-growing region in New England, for the 

 purpose of investigating damage done by insects. The attention of 

 the Department was called to a serious trouble affecting the spruce 

 trees, in March, 1900, and Dr. Hopkins was chosen for the investiga- 

 tion for the reason that he has studied forest insects for many } T ears 

 and is generally known as the leading forest entomologist of the 

 country. His report indicates that he was not only able to determine 

 the cause of the difficulty, but to suggest practical measures of relief. 

 I recommend that it be published as Bulletin No. 28, new series, of 

 the Division of Entomology. 



Respectfully, L. O. Howard, 



Entomologist. 

 Hon. James Wilson, 



Secretary of Agriculture. 



