TABLE OF COXTENTS. 



Subfamily 3. 

 POLYBOllIN.E 



Genera. 



PoLTBORUS .... 



Sexex 



Phalcobj;sfs . . 



MlLVAGO 



5. Daptrius 



6. IfirCTER 



Subfamily 4. 

 CIRCAETIN.E 



Genera. 



1. Hekpexotheres . . 



2. CiRCAETUS .... 



3. Spilornis 



4. Drtotriorchis . . 



5. eutriorchis .... 



6. Heloxarsus .... 



Subfamily 5. 

 GYMXOGEXYX^. 



Genus. 



1. PoLTBOROIDES 



Subfamily 6. 

 CIECIX.E 



Genus. 



1. CiRcrs 



Subfamily 7. 

 ACCIPITRIN.E 



Genera. 



1. MlCRASTUR . . . . 



2. Geranospizias . . 



3. Urotriorchis . . 



4. ^ELIERAX 



5. AsTURratlLA . . . . 



11 

 11 



12 

 12 

 13 

 13 

 14 



14 



14 

 14 



16 

 17 

 17 



18 



18 

 18 



19 

 19 



24 



24 

 25 

 26 

 26 



Page 



6. AsTUR 28 



7. LoPHOdPIZIAS 29 



8. XisoiDEs 29 



9. scelospizias 30 



10. Erythrospizias .... 32 



11. Tachyspizias 32 



12. Letjcospizias 33 



13. Urospizias 33 



14. AcciPiTER 38 



Subgenus A. 

 cooperastttr 



15. Erythrotriorchis 



16, Megatriorchis 



Subfamily 8. 

 THKASAETIX^ 



43 



45 

 45 



45 



Genera. 



1. iiorphnus 45 



2. Harpyopsis 46 



3. Thrasaetfs 46 



Subfamily 9. 



AQUILINJE 46 



Genera. 



1. SpiZAETUS 46 



2. LlMNAETUS 47 



3. LOPHOTRIORCHIS .... 50 



4. LoPHOAExrs 50 



5. Neopus 51 



6. Spiziastur 51 



7. Ntsaetfs 51 



8. Aquila 53 



9. TjRgAExrs 57 



Subfamily 10. 

 HALIAETIX^ . 



58 



