MONOGRAPH OF THE FALCONIDA, 
1-6 quill emarginated; exterior toe longer than the interior; tail 
a little cuneiform. The Aguwiline type. 
5. Ag. nevioides, Cuy.; Ag. nev. et senegalla, Cuy.; F. rapaa, 
Temm. pl. col. 455; Ag. albicans, Riipp. 138, 1, 2; A. Fulvescens, 
fusca, punctata, J. E. Gray; Ag. vindhiana, Frankl.—Bill with an 
obtuse tooth ; on the cere 26 mm. high; middle toe 58 mm. long; 
tail 270 mm. or 133” long. Asia, Africa. 
6. Ag. heliaca, Sav. Deser. d’Eg. t. 12; F. imperialis, Bechst., 
Naum. t. 6, ad., t.7, young; F. bifasciata, J. Gray, Ind. Zool.— 
The bill divided to the hind corner of the eyes; wings longer than 
the short tail; middle toe with 5 scales before the claws. Eastem 
Europe, Asia, Africa. 
7. Ag. bonelli, Bon.; F. bonelli, Temm. pl. col. 288; Ag. inter- 
media, Bonelli; A. fasciata, Vieill; Spizaétus grandis, Hodgs.— 
Middle toe 62 mm. long; beneath with black longitudinal spots. 
S. Europe, Asia. 
8. Ag. fulva, Cuv.; F. fulvus, chrysaétus, melanaétus, et cant 
densis, L.; F. niger, Gmel., Naum. 8, 9.— Tail 18-13)” long. 
Europe, America, Asia, Africa. 
e. Subgenus Uroaétus, Kp. — The bill very high, tail very long; 
the first tail-feather one-third shorter than the middle one. The 
Buteonine or Vulturine type. 
9. A. audazx, G. Gray; I. audax, Lath.; Aq. fucosa, Cuv.; pl: 
col. 32; Ag. albirostris, Vieill. — Tail 143-153” long. We see 
analogies with the H. pelagicus, which is in its genus the same 
representative of the same type. Australia. 
II, Genus HELOTARSUS, A. Suira. 
The very long wings extend beyond the very short tail. The Mil- 
vme or Swallow type. 
1. H. ecaudatus, G. Gray; F. ecaudatus, Daud., Vieill. 7, 8: 
— Black with rufous body, tail-coyers and tail. Africa. 
Il, Genus CIRCAHTUS, Kavp. 
The middle toe shorter than the tarsus, 
covered with small scales. 
The Accipitrine or Grallatorial type. 
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