PART IV.—MAY 20, 1922. 
SYNOPSIS 
OF THE 
ACCIPITRES 
(Diurnal Birds of Prey) 
PART IV, 
(MicroHIERAx TO Panpion) 
Comprising Species and Subspecies described up to 1920, with 
their Characters and Distribution 
BY 
H. KIRKE SWANN, F.Z.S., M.B.O.U. 
Corresponding Fellow, Amer. Orn. Union. 
SECOND EDITION 
REVISED AND CORRECTED THROUGHOUT 
LONDON : 
PRIVATELY PRINTED FOR THE AUTHOR. 
