BLACK-WINGED KITE. 113 



Of the other two Mr. Gurney thinks there is sufficient 

 evidence to place them among the doubtful species; 

 and as the . publication of this work will extend over 

 three or four years, there will probably be abundant 

 materials in that time to form a supplement of really 

 indigenous or accidental species, about which the 

 evidence may admit of no reasonable doubt. 



