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. 
