SYSTEMATICALLY ARRANGED BY DR. T. T. KAUP. 
Y. And last Genus IBICTER, Kaup. 
The nostrils round, bored in the nasal bones; bill long, with a trace 
of a tooth and an emargination on the under mandible. The true 
Buteonine or Vulturine type. 
a. Subgenus Dapirius, Viecill.— The face and chin naked ; the 
wings extend to two-thirds of the body; tail long; 1-5 quills with 
a slender emargination ; middle toe with regular transverse scales, 
and as long as the scaled part of the tarsus; outer toe a little 
longer than the inner. The Falconine type. 
1. Ibicter aterrimus, Kp.; F. aterrimus, Temm. pl. col. 37, 342, 
young ; Dapirius ater, Vieill., Gal. 5.— Black, the superior middle 
of the tail white. Cayenne. 
b. Subgenus Phalcobaenus, D’Orb.—The face naked ; the wings 
extend beyond the tip of the tail; 1-4 quill distinctly emarginated. 
The Milvine type. 
2. [bicter montanus, Kp.; Ph. montanus, D’Orb., Voy. dans Am. 
with a figure; Ag. megaloptera, Mey. Noy. Acta, 1834, t. 8; 
Milvago albogularis, Gould, Voy. of Beagle Birds. pl. 1. — White 
and black ; the head-feathers crisp like a Craw. Chili. 
ce. Subgenus Mélvago, Spix.—Lorum and eye-region naked; the 
wings extend to two-thirds of the tail; 1-5 quills slenderly emar- 
ginated ; toes with regular transverse scales, and shorter than the 
thin tarsus ; outer and inner toes of equal length, The Accipitrine 
type. 
3. I. chimachima, Kp.; P. chimachima, Vieill., Azara, 4; F’. de- 
gener, lll.; Milv. ohrocephala, Spix. t. 5, ad.; Gymnops strigi- 
latus, Spix, t. 4, young.—Tarsus bluish, and 50 mm. long. S. 
America. 
4. I. chimango, Kp.; P. chimango, Vieill., Azara, 3; Ag. pezo- 
pora, Mey, Noy. Act, 16, t. 6. —Tarsus yellowish, and 63 mm. long. 
S. America. 
d. Subgenus Aétotriorchis, Kp.—Lorum and eye-region naked ; 
the wings do not extend to the tip of the tail; 1-5 quill emar- 
ginated ; middle toe longer than the scaled part of the tarsus, 
which has before the toes 3-4 transverse scales. The Aquiline 
type. 
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