XU PREFACE. 



plain statement, given by observant farmers, of what 

 treatment answers. 



For myself I only wish I could have done my part 

 better, but I have earnestly tried to make it correct 

 and clear, and it will be a great satisfaction to me if 

 it should prove of use. 



ELEANOE A. OEMEEOD, 



Late Consulting Entomologist of the IioyaJ 

 Agricultural Society of England. 



TOKRINGTON HoUSE, St. AlBANS, 



July 2(Jth, 1892. 



