4 LETTER OF TRANSMITTAL. 



Tlic botanical illustrations showing external characters are by Mr. (ieorge B. Siulwortii; those 

 of the anatomy of the \vo(»il are by -Mr. N. B. Pierce and Mr. Filibert Koth, and those of parasitic 

 orfiiinisins and disease conditions are from Ilartig's "Lehrbuch der Baniiikrankheiten" and 

 '•Zersi'tzung8ers(;lieinungen des Holzes."' The illnstrations accompanying the section on injurious 

 insects were furnished by the Division of Entomology. The map of distribution was iirepared in 

 the Division of I'orestry. 



The monograph is believed to be Just in time for tlie use for whicli it is intended, namely, to 



prepare for the application of sylviculture to the remnant of our pineries. 



Respectfully, 



B. E. Fernow, 



Chief of Division. 

 Hon. James Wilson, 



Secretary of Agriculture. 



