PREFACE, 
vii 
after which there yet remain five others whose existence we have 
ascertained, making a total of two hundred and sixteen.* 
The lai ge size and importance of some of the birds given in 
the two present volumes, among which are three Hawks and four 
Grouse, have obliged us to distribute the sixteen new species that 
they contain, together with nine others, of which two only are 
reduced, upon twelve plates. It therefore rested with our pub¬ 
lishers to issue one large, or two smaller volumes, and the latter 
course is that which they have thought proper to adopt. 
* These ma y a11 be found in ou r Synopsis of the Birds of the United States, and 
Appendix , published in the Annals of the Lyceum of Natural History of New-York 
Yol. II. 
