The foregoing reprint t)f Kirby's Fauna Boreali-Americana was begun 

 in the number of the Canadian Entomologist for April, 1870 (Vol. ii, No. 6)), 

 and was earned on as space could be afforded for it, and consequently 

 with much interruption, up to the current year, 1876. No one interested 

 in the publication anticipated that so long a period of time would have 

 elapsed before its completion. The usefulness of the reprint has no doubt 

 been soniew^hat impaired by its diffusion through sc many issues of our 

 journal, and by the irregularity with which the several portions have 

 appeared ; but on the whole, it is evident that the temporary inconveniencg 

 — if such there has been to any one — has been more than counterbalanced 

 by the criticism and consequent benefit that the work has received. 



While expressing his thanks for many hints and much valuable assist- 

 an.e that he has received from his friends from time to time, the compiler 

 desires especially to state that he feels deeply grateful to Dr. George H. 

 Horn, of Philadelphia, for the great kindness he has shown and the 

 trouble he has taken, in going over the whole of the Coleoptera and 

 correcting the synonymy wherever it was not in accordance with the latest 

 investigations of competent Entomologists. He deems himself particulaly 

 fortunate in havin^^ this work done by so eminent an Entomologist as Dr. 

 Horn, and he feels that the reprint may now go forth to the world as a 

 satisfactory and reli:.ble guide to the student in the determination of the 

 species oi Coleoptera described by Kirby : without Dr. Horn's revision, it 

 certainly would not have been so. Ihe following is the revision of the 

 synonymy contributed by Dr. Horn ; — 



SYNONYMY OF THE COT>EOPTERA OF THE FAUNA 

 BOREALI-AMERICANA, KIRBY. 



BY GEO. H. HORN, M. D., PHILADELPHIA, PA. 



Since the reprint of Kirby's Fauna Boreali-Americana began, much 

 has been learned concerning the species of Coleoptera therein described 

 or mentioned, so that at the present time very few remain unidentified. 

 Through the kindness of the authorities of the British Museum, every 

 facility was granted to Dr. Leconte and myself for the study of Kirby's 

 types, and the results of these studies have already been made known by 

 Dr. Leconte. It will be noticed in very many })laces that the synonymy 

 here given differs very greatly from that given by Mr. Bethune, who com- 

 piled from the best known sources all that was at the time known or 

 guessed concerning Kirby's species. 



