LETTER OE TRANSMITTAL. 



U. S. Department of Agriculture, 



Division of Agrostology, 

 Washington, I). 0., May 3, 1899. 



Sir: I have the liouor to transmit lierewitli the manuscript of a 

 paper entitled " Synopsis of the genus Sitanion,'" prepared under my 

 direction by Mr. Jared G. Smith, assistant agrostologist, and recom- 

 mend the same for publication as Bulletin ISTo. 18 of this division 

 under the general title of " Studies on American Grasses." 



Eespectfully, 



F. Lamson-Scribner, 



Agrostoloyist. 



Hon. James Wilson, 



Secretary of Agriculture. 



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