ADVERTISEMENT. 



A catalogue of the described Coleoptera of the United States, 

 prepared by Dr. F. E. Melsheimer, and revised by Prof. Halde- 

 man and Dr. LeConte, was published by the Smithsonian Insti- 

 tution in 1853. This work furnished a reference to all the species 

 described at the time, and known to the author or editors, but did 

 not profess to indicate what were synonymes and what actual 

 species. 



Dr. LeConte has since had in view a new and improved cata- 

 logue, and by his own researches, and by reference to those of 

 others, has endeavored to ascertain the proper synonymy of the 

 North American Coleoptera, adding the new species described 

 since the date of the Melsheimer Catalogue. 



The portion of the New List, now published, includes all the 

 families treated of in Part I of the Classification of the Coleop- 

 tera of North America, by Dr. LeConte, who will complete that 

 work, with its companions, the "List," and the "Descriptions of 

 New Species of North American Coleoptera," at the earliest 

 practicable moment. 



Pages 1 — 49 were published in March, 1863 ; pp. 50 — 10 in 

 April, 1866. 



JOSEPH HENRY, 

 Secretary S. I. 



Smithsonian Institution, 



Washington, April, 1866. 



PHILADELPHIA : 

 COLLINS, PRINTEE. 



