﻿LETTER OF TRANSMITTAL. 



U. 8. Department of Agriculture, 



Division of Biological Survey, 



Washi7igt07i, D. C, July 1, 1897. 

 Sir : I liave the lionor to transmit herewith, and recommend for pub- 

 lication, the manuscript of No. 13 of North American Fauna, comi)risiiig 

 a monographic revision of the bats of the family Vesj^ertilion idw inhab- 

 iting North America north of Panama, b}^ Gerrit S. Miller, jr. It is 

 based mainly on material belonging to the Biological Survey, where 

 the work has been done. 



The Department is constantly in receipt of bats sent for identitica- 

 ion and of letters of inquiry concerning these animals; but heretofore, 

 owing to the chaotic state of the literature relating to this group and 

 the uncertainty respecting the status of the various species, it has been 

 impossible to answer such inquiries with any degree of certainty. The 

 present paper is intended to remove these difficulties. 

 Eespect fully, 



C. Hart Merriam, 



Chief J Biological Survey. 



Hon. James Wilson, 



Secretary of Agriculture. 



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