122 
TlMEHRI. 
the drawback of separating those closely related from 
each other. They will therefore be considered chiefly 
in the order of their relationship, and in this way 
some idea will be formed of the extent and distri- 
bution of the main divisions. Of the 43 species, four 
belong to the group of the caracaras, seven to the 
falcons, seven to the kites, seven to the sparrow-hawks 
and harriers, and seventeen to the buzzards — the re- 
maining one being the fishing hawk or osprey. Taking 
them in this relation, the species may be grouped as 
follows — 
Ibycler americanus Milvago chimachima 
,, aier Polyborus cheriway 
Harpagus bidentatus 
Hypotriorchis femoralis 
Falco aurantius 
Herpetotheres cachinnans 
Iclinia plumbed 
hypotriorchis rufigularis 
Tinnunculus isabellinus 
Rostrhamus sociabilis 
Elanoides furcatus 
Leptodon cayennensis 
Gampsonyx swainsoni 
Accipiter bicolot 
Micrastur gilvicollis 
„ mirandollei 
Circus maculosus 
Thrasaetus harpyia 
Spizaetus ornatus 
Asturina magnirostris 
Rostrhamus leucopygus 
Eianus leucurus 
Leptodon uncinatus 
Accipiter tinus 
Micrastur semitorquatus 
Geranospizias gracilis 
Morphnus guianensis 
Spizaetus tyr annus 
Asturina nitida 
