LETTER OF TRANSMITTAL. 



U. S. Department of Agriculture, 



Division of Entomology, 

 Washington, D. C. , February 17, 1900. 

 Sir: I have the honor to transmit herewith a manuscript containing 

 a series of articles dealing with the subject of insects injurious to gar- 

 den crops, prepared by Mr. F. H. Chittenden, of this Division. Similar 

 articles, by the same writer, have been published from time to time in 

 Bulletins Nos. 10 and 19, new series, of this Division, also in various 

 circulars, and in the Yearbooks of the Department for 1896 and 1898. 

 The general subject has been under investigation for several years 

 with the plan of publishing, ultimately, a complete volume on the 

 garden insects of the United States for the practical use of truck 

 farmers and gardeners. The articles which have been published and 

 these which are presented have been prepared (where not prelimi- 

 nary or supplementary to more complete accounts) in detail, giving 

 the complete history, as far as is known, of each species treated, a work 

 which involves a great amount of original study, and which is pub- 

 lished in full as a matter of record and for the use of working economic 

 entomologists as well as of farmers. It is planned, however, in the 

 completed report to condense all of this matter into an easily under- 

 stood and practical working form. I recommend the publication of 

 this group of articles as Bulletin No. 23, new series, of this Division. 

 Respectfully, 



L. O. Howard, 



Entomologist. 

 Hon. James Wilson, 



Secretary of Agriculture. 

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