POLYBORUS. 
&57 
capensis Gray, Handl. Birds I. 38. = Nisus radiatus Schleg. 
Malzakii Verreaux, Revue Mag. Zool. 1855. 349. Tb. 13. = Nisus radiatus 
Schleg. 
radiatus Bonaparte, Conspect. Avium I. 12. = Nisus radiatus Schleg. 
typicus Smith, Illustr. SAfr. Zool. Tb. 81. 82. = Nisus radiatus Schleg. 
POLYBORIJS (Falconidae. — TUoXußopoc edax). — Vieillot, Analyse 1816. 
22; Encycl. méth. 1180. — Gray, Genera Birds I. 10. — v. Tschudi, Fauna 
peruan. 77. — Schlegel, Mus. Pays-Bas Polybori I. 
Synon.: Milvago Spix. — Phalcobaenus Lafresn. — Caracara Cuv, — Parasifalco 
Less. — Senex Gray. — Aetotriorchis Kaup. — Helotriorchis Reichb. 
Bill short, the culmen much elevated at the base^ and much arched to the tip, 
which is slightly hooked; the sides much compressed and the lateral margins slightly 
sinuated near the tip; the nostrils oblong, oval, oblique and placed in the upper 
anterior angle of the cere. Wings lengthened pointed, with the third quill the 
longest. Tail moderate, broad and slightly, rounded at the end. Tarsi lengthened, 
longer than the middle toe, covered in front and behind with large irregular scales, 
which are divided in their middle and on the sides with small ones. Toes mode- 
rate^ the outer rather shorter than the inner and all covered with strong transverse 
scales; the claws strong and slightly curved.^ those of the inner and hind toes the 
largest. The lores and cere slightly covered with a few scattered hairs. — 
5 Specc. 
albogularis Gould, Proc. Zool. Soc. 1837. V. 9. = Polyborus megalopterus 
Schleg. 
aterrimus Sundevall, Journ. Ornith. 1855. III. 168. — ? 
Auduboni Cassin, Proc. acad. Philadelphia 1862. 2. = Polyborus brasiliensis 
augtralis Bonaparte, Conspect. Avium I. 13. — Schlegel, Mus. Pays-Bas 
Falco australis, F. ambustus Gmélin, Syst. Nat. I. 259. 
Falco leucurus Forster, Icon ined. 34. 
Falco novae Zealandiae Temminck, Pl. color. 29. 192. 224. — Jardine 
et Selby, Illustr. Ornith. Tb. 24. 
Polyborus novae Zealandiae Lesson, Traité Ornith. 98. 
Circaetus antarcticus Lesson, Traité Ornith. 49. 
Vultur plancus Förster, Descr. anim. 323. $ 
Falco harpe Forster, Descr. anim. 68. 
Milvago leucurus Gray, Voy. Beagle III. 13. 15. 
Milvago australis Gray, Genera Birds I. 9. — Sclater, Proc. Zool. Soc. 
1860. 383. 
Ibicter (Aetotriorchis) australis Kaup, Oken's Isis 1847. 357; Wiegm. Arch. 
1850. XVL 41. 
Helotriorchis Reichenbach, natürl. Syst. Tf. 98. 
Aetotriorchis australis Bonaparte, Revue Mag. Zool. 1854. 139. 
Senex leucurus Gray, Handl. Birds I. 5. 
brasiliensis Swainson, Zool. Illust. n. ser. Tb. 2. — Audubon, Birds Ame- 
rica. — Schlegel, Mus. Pays-Bas. Polyb. 2. [America centr. merid. 
Falco brasiliensis Gmelin, Syst. Nat. I. 262. 
Falco tharus Molina, Sagg. stor. nat. Chile II. 173. 
Vultur plancus., V. cherivay Latham, Ind. Ornith. I. 8. — Forster, Descr. 
anim. 321. 
Falco cherivay Jacquin, Beitr. Natg. Vögel 17. 
Falco plancus Miller, Cimel. phys. Tb. 17; Illustr. nat. hist. 
Falco tharus Gmelin, Syst. Nat. I. 262. 
Polyborus vulgaris, P. cherivay Vieillot, Galerie Ois. 1. 23. Tb. 7. — Spix, 
Aves Bras. I. 3. Tb. 1. — Audubon, ornith. Biogr. IL 350. — Bur- 
meister, Uebers. Th. Bras. II. 40. — Gundlach, Journ. Ornith. 1871, 
XIX. 357. 
SWAINS. 
Polyb. 3. 
[America merid. 
GntBEL, Thesaurus. III, 
17 
