INTRODUCTION 



This supplement is intended to include all the names proposed for 

 beetles from America, north of Mexico, between January 1, 1919 and 

 December 31, 1924, a period of six years. With each species is given a 

 serial number, and with each name its author, place of description and 

 locality. The system of citation is the same as that used in the catalogue, 

 viz.: the last two figures of the year date and, separated by a hyphen, 

 the page on which the description occurs. Citations in the case of genera 

 are given only for those newly erected. The authors are arranged alpha- 

 betically in the bibliography, each followed by a list of his writings and 

 place of publication. 



There are also included the corrections to the catalogue which have 

 been called to our attention since its publication by Theodore L. Bissell, 

 W. S. Blatchley, Herbert S. Barber, J. B. Corporaal, F. H. Chittenden, 

 E. A. Chapin, Henry Dietrich, H. C. Fall, C. A. Frost, W. S. Fisher, 

 Melville H. Hatch, Wm. A. Hoffman, Philip Laurent, Fred Muir, Howard 

 Notman, Chris E. Olsen, E. A. Schwarz (through Mr. Barber), E. P. Van 

 Duzee, R. H. Van Zwaluwenburg, Charles B. Wilson and Joe S. Wade, 

 and such as have been observed by us in the course of preparing this 

 supplement. 



It has seemed necessary to depart from the plan, strictly followed in 

 the catalogue, of accepting the views of the most recent author. In the 

 Cicindelidae, for instance, this would have exalted some recently described 

 forms by comparison. We have endeavored in such cases to indicate their 

 relation to previously described species. In the case of certain catalogues 

 and revisions printed in Europe, ignorance of American species has 

 caused a few evident errors which we have not followed. But as a general 

 rule, we have not attempted to review the work for six years of 213 

 authors, a manifestly impossible task. 



In the case of Col. Casey's writings, and as far as we could find else- 

 where, the author's statement that his description is based on a single 

 specimen is indicated by a ^ following the name. 



