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INTRODUCTION 



This fifth supplement to the Leng Catalog of North American 

 Coleoptera is offered by the compilers and by the publisher in 

 lieu of the much desired new catalog. Many difficulties have 

 continued to make it impossible to prepare a new edition of the 

 catalog, and it is hoped that another supplement will be of some 

 help in bringing the old catalog up to date. 



The fonn of the fifth supplement is the same as that of the 

 fourth. The remarks in the Introduction to the Fourth Supplement 

 apply equally here. A list of signs and abbreviations appears on 

 page 6 of the Fourth Supplement. 



Grateful acknowledgment is made to more than 150 colcopterists 

 who have checked preliminary lists of their publications and to 

 the many who have sent in coiTcctions and manuscript notes for in- 

 clusion in the text. 





