

ee Se 
SYSTEMATICALLY ARRANGED BY DR. T. T. KAUP. 
account of the face and chin being naked, and because in this sub- 
family fruit-eaters appear. In this subfamily, particularly in the 
last. genus, Ibicter, we see the impurest character of the whole 
family. 
I. Buteo. II. Pernis. II. Polyborus. IV. Rostrhamus. V. IsitcTer. 
I. Genus BU TEO, Becust. 
The nostrils half-moon shaped, on the end of a soft membrane. 
a. Subgenus Archibuteo, Brehm.—Tarsus feathered but not the 
sole; toes with scales before the claws; 3-4 transverse scales. The 
Faleonine type. 
1. B. lagopus, Bechst.; F. lagopus, Brann.; Naum. t. 34; Vaill. 
18.—Tarsus 64-66 mm. long; the inner-covers of the wings white 
and rufous-yellow, with large black spots. N. Europe, S. and. N. 
Africa. 
2, Buteo sancti johannis, Bonap.; F. sancti johannis, Gmel.; F. 
niger et lagopus, Wils. 55-1, ad., 33-1, young; Buteo ater, Vieill.; 
Archibuteo regalis, G. Gray ? female. —Tarsus 86 mm. long ; tail 
230 mm. long, female. America. 
3. Buteo strophiatus, Kp.; Ag. strophiata, Hodgs.; Buteo leuco- 
cephalus, Hodgs.; Buteo hemilasius, Temm. et Schl. Fauna Jap , 
t. vii.—Large like an Aquila nevia ; tarsus 93; tail 256 mm. long. 
Asia, 
b. Subgenus Tachytriorchis, Kp.— The long wings extend be- 
yond the tip of the tail; 1-2 quill distinct, 3 and 4 slender emar- 
ginated. The Milvine type. 
4, Buteo albonotatus, G. Gray.— Black with concealed white 
spots, which on the general plumage shine through. §, America. 
5. Buteo pterocles, Cuy.; pl. col. 56, 139; Buteo albicaudatus, 
Vieill.; Spiz. leucurus, Vieill.; Ag. cola blanca, Azara.— Black, 
with rufous spots on the wings; tail on the upper half white with 
fine gray bands ; tarsus 91-92 mm. long. S. America. 
c. Subgenus Pecilopternis, Kp. —The short wings extend to the 
middle of the tail; 1-3 quill distinct, 4 slender emarginated. The 
Accipitrine type. America. 
6. B. wilsonti, Bonap.; F. pensijlvanicus, Wils. 54-1; F. latissi- 
75 

