PBEFACE. Vll 



and are illustrated by the most typical forms 

 contained in Mr. Gould's Cabinet ; but where 

 these 'forms have been previously described in 

 the " HUMMING-BIRDS" of the "NATURALIST'S 

 LIBRARY," a reference to them only is given, 

 and thus the writer avoids infringing upon a 

 work of great utility, and at the same time, so to 

 speak, incorporates his own with it, as (he trusts) 

 a not unworthy sequel. 



That much remains to be added to this 

 volume is readily conceded, but if it prove the 

 nucleus around which fresh matter may from 

 time to time be accumulated, the author's aim 

 will be accomplished. 



