SYSTEMATICALLY ARRANGED BY DR. ". T. KAUP. 
e. Subgenus Piernura, Kp.— The tail longer than the body; 
1-6 quill slender emarginated. The Buteonine type. 
7. Sp. tyrannus, Kp.; F. tyrannus, Pr. Max. pl. col. 73.— 
Black or black brown, with white tail-covers; the tail 346 mm. 
long. S. America, 
Il. Genus NISUS, Cuv. ACCIPITER, Briss. er ANGLICOR. 
The tarsus is long and slender, with twelve or thirteen indistinct 
transverse scales before and behind; the external toe longer than 
the internal. This genus has the smallest forms in the whole sub- 
family. The Mélvine type. 
a. Subgenus Hiéraspizia, Kp.— The secondaries cover 3 of the 
quills; the eye region naked; 1-4 quill emarginated; the inner 
wings banded, and the tail with three or four bars. The Faleonine 
type with the smallest forms. 
1. WN. vel. Ace. tinas, G. Gray ; F. ténus, Lath.; Ace. tinus, Gen. 
of Birds, with an excellent fig.; J*. superciliosus, Linn.—Breast 
and beneath with fine bands. S. America 
2. N.vel. Ace. minullus, Cuv.; F. minullus, Shaw, Daud., Vaill. 
xxxiv.— Tail with three white bars, which shine through on the 
surface; the least upper tail-covers white, black banded, with 
broad white margin, 8, Africa. 
3. N.vel. Ace. virgatus,Cuv.; F.virgatus,Reinw.; Temm. pl. col. 
109.—Chin white, witha central black stripe and moustaches. Asia. 
b. Subgenus Tachyspizia, Kp.—'The secondaries cover 24 of the 
quills; 1-4 quill not distinctly emarginated; middle toe as long 
as the scaled part of the tarsus; bill with a circular formed tooth. 
The Milvine type. 
4. N, soloensis, Kp.; F. soloensis, Horsf. ; F. cuculoides, Temm. 
pl. col. 110, 119.— The adult bird with black wings; on the upper 
parts pure white; beneath whitish and wine red. Asia. 
ce. Subgenus Scelospizia, Kp.— Tarsus very long; middle toe 
short ; 1-4 quill emarginated ; the inferior part of the wings band- 
ed; the tail with four or five bars. The Accipitrine type. 
5. N. vel. Ace. francessi, A. Smith, Ill. of S. Afr. — Tarsus 
46-49; middle toe 23-26 mm. long. Madagascar. 
d. Subgenus Nisus, Kp.— The bill without a circular formed 
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