of the investigation. The several gentlemen on whose plantations 

 the Department's experimental farms have been located have greatly 

 facilitated the work b}^ careful attention to instructions given as to the 

 growing of the crop. 



The principal results of field experiments in 1904 have been pub- 

 lished in Farmers' Bulletin No. 212 of this Department. The present 

 work deals more especially with results of laboratory investigations 

 and other points of interest concerning the insect as a pest to cotton 

 and other crops throughout its extended range. 



