LETTER OF TRANSMITTAL. 



U. S. Department of Agriculture, 



Division of Entomology, 

 Washington, D. (7., January 21, 1899. 

 Sir: I have the honor to transmit herewith manuscript of a bulletin 

 containing" certain articles upon insects injurious to garden and. orchard 

 crops, which has been prepared by F. H. Chittenden, of this office. 

 The articles all concern iusects of very considerable economic impor- 

 tance and derive an especial value from the fact that they are, with 

 few exceptions, based upon original observations made in the vicinity 

 of Washington. The worker on economic entomology will find very 

 many hitherto unreported facts concerning tbe life histories of the 

 species treated, and the vegetable grower and orchardist will find many 

 valuable practical points based upon this more intimate knowledge of 

 the life histories of the insects. Seventeen of the twenty figures are 

 here published for the first time. 



I recommend the publication of this manuscript as Bulletin No. 19, 

 New Series. 



Respectfully, L. O. Howard, 



Entomologist. 

 Hon. James Wilson, 



Secretary of Agriculture. 



