LETTER OF TRANSMITTAL. 



U. 8. DEPARTMENT OF AGRICULTURE, 



Washington, D. C., June 15, 1899. 



SIR: I have the honor to transmit herewith for publication, as No. 15 

 of North American Fauna, a 'Revision of the Jumping Mice of the 

 Genus ZapusSby Edward A. Preble, assistant in the Biological Survey. 

 Respectfully, 



T. S. PALMER, 



Acting Chief, Biological Survey. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 

 2 



