118 HUMMING-BIRDS. 



The desire to procure every information previous to 

 forming any decided opinion, has therefore determined 

 us to attempt no arrangement in the present volume, 

 and, with two exceptions, to retain the whole under 

 the family name of Trockilus. The genera which 

 have been adopted, are illustrated in the first and last 

 plates. 



In a second volume now in preparation, it is in- 

 tended to figure thirty -five or forty additional species, 

 and with these to give the characters of the families 

 and genera which have been instituted, illustrating 

 the parts and dissections by woodcuts; to add a 

 systematic synopsis of the species which have been 

 described, and in this manner endeavour to complete 

 the natural history of the group. 



