SYSTEMATICALLY ARRANGED BY DR. T. T. KAUP. 
10. NV. cruentus, Kp.; Astur cruentus, Gould, Birds of Austr. 
—Size of N. pileatus; tarsus 70-72 mm. long; tail with fifteen 
bars. 
11. N. approwimans, Kp.; Astur approwimans, Vig. and 
Horsf.; Ast. radiatus et fasciatus, Vig. and Horsf.; IF. radiatus, 
pl. col. 123, young, Gould, Birds of Austr.—Size of a male of As¢. 
palumbarius ; tarsus 72-83 mm.; middle toe 36-45 mm. long ; tail 
with 14-19 bars. 
Ill. Genus GERANOPUS, Kavp. 
IscuNnosceLis, Strickl. (employed). 
The exterior toe shorter than the interior; 1-5 quill emarginated. 
The Accipitrine or Grallatorial type. 
1. G. gracilis, Kp.; F. gracilis et hemidactylus, Temm. pl. col. 
3, 91. — Slender like Circus cyaneus. 8. America. : 
IV. Genus ASTU R, Brcusr. 
The tarsus larger, more robust, and the transverse scales more 
distinct than Nisus ; the external toe longer than the internal; the 
bill shorter and more curved than Austurina. 
a. Subgenus Lophospizia, Kp.— Occiput like Spiziaétus with 
a little crest; the secondaries cover the quills 3; tarsus feathered 
to the middle; toes before the claws with three or four transverse 
scales. 
1. A. trivirgatus, G. Gray; F. trivirgatus, pl. col. 803; Ast. 
indicus, Hodgs.— Lower part of the breast, belly, and the tibial 
feathers with broad bars. This species has anologies with Sp. cir- 
rhatus. India and its Archipelago. 
. Subgenus Micronisus, G. Gray.—Occiput without a crest ; 
the secondaries cover 2 of the quills; 1-4 quill emarginated ; tar- 
sus and toes short; middle toe as long as the scaled part of the 
tarsus. The Milvine type. This subgenus shows analogies with 
Nisus. ; 
2. A. monogrammicus, Sw. W. Afr. Birds, t.iy.; F. monogram- 
micus, Temm. pl. col. 314.—Chin with a central longitudinal black 
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