6 Introduction 



We are under special obligations to Mr. Herbert S. Barber, of 

 Washington, D. C, for the opportunity of comparing the notes made by 

 Dr. E. A. Schwarz, Mr. W. S. Fisher, and himself, in the U. S. National 

 Museum. Many of the abstruse questions in nomenclature, such as those 

 affecting Chlamys, Elater, Graphisurus, Otidocephalus, have originated in 

 these notes. 



In conclusion we would call attention with gratification to the large 

 proportion of papers on the habits of beetles noted in the bibliography. 

 The work of Mr. Harry B. W^eiss, covering 45 titles, is a fine example of 

 such work. 



Charles W. Leng 

 Andrew J. Mutchler 



