LETTER OF TRANSMITTAL. 



United States Department of Agriculture, 



Division of Entomology, 

 Washington, D. C.^ November 3^ 190S. 

 Sir: I have the honor to transmit herewith for publication A Brief 

 Account of the Principal Insect Enemies of the Sagar Beet, prepared 

 b}' Mr. F. H. Chittenden, of this office. This paper has already 

 appeared as a portion of Report No. T-i of the U. S. Department of 

 Agriculture entitled "Progress of the Beet-Sugar Industry in the 

 United States in 1902," for which it was specialh^ prepared by your 

 instructions. Osving to the subordinate position held b}^ this article, 

 the consideration of the subject was limited to the more prominent 

 msect pests affecting sugar beet, and it was therefore impossible to 

 enter into detail regarding these or other less injurious insects which 

 are known to affect this important crop plant. Man}" of the species, 

 especially" those of greatest economic importance, have received more 

 extended notice in other publications of this office, notabl}^ in Bulletins 

 Nos. 19, 23, 29, 33, and 40, of the same series, and there are many 

 others known to affect sugar beet which are not even mentioned, 

 chiefly because we are not sufficiently conversant with their economic 

 status. 



I recommend the publication of this paper as Bulletin 'No. 43, of 

 this Division. 



Respectfully, 



L. O. Howard, Entomologist. 

 Hon. James Wilson, 



Secretary of Agriculture. — 



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