The Species found iu America are thus distriljuted : — 



America — Northern 15 



Central 34 



,, Southern 7 



It now only remains to me to express my warmest thanks to all who have 

 kindly assisted me : to Dr. Horn, Mr. Schwartz, Capt. T. L. Casey ; to MM. C. 

 Brisout de Barneville, Borre, Van de Poll, Fleutiaus, Salle, and Prof. Fiori ; to my 

 lamented friends. Dr. Leconte, Dr. N. A. C. Dohrn, Mr. E. W. Janson, MM. de 

 Marseul and Perris ; in my own country, to Dr. Sharp, Messrs. Champion, Lewis, 

 and Waterhouse, and especially to Herr Eeitter and Dr. P. B. Mason, I am indebted 

 for the means of bringing this work to completion. Without their help any 

 investigation of these obscure classes of Coleoptera must have been hopeless ; and, 

 indeed, to the generosity of my last-mentioned friend. Dr. Mason, its present 

 publication is entirely due. 



