INTRODUCTION i x 



more than approximately accurate, are mostly given as recorded 

 on the labels, though much verification and correction for ears 

 and hind feet has been done from the dried specimens. In order 

 to economize time, the records of registered material were made 

 directly from the specimens which I had identified. Mrs. 

 Oldfield Thomas and Mr. R. C. Wroughton carried out this 

 portion of the work. 



G. S. M. 



Washington, 



1, 1912. 



