” 
MONOGRAPH OF THE FALCONID A, 
2. H. bidentatus; F. bidentatus, Lath.; Temm. pl. cal. 28, 
adult, 228, young; Bidens rujfiventer et albiventer, Spix, t. vi. vi. 
— Adult, beneath rufous. 
Iv. Genus FALCO. 
One distinct and large tooth on the upper mandible; the toes 
long, and the exterior longer than the interior; the tarsus with 
wregular scales; the first or the first and second quills emarginated 
The Aqguiline type. Cosmopolite. 
a. Subgenus disalon, Kp.— Little falcons with short wings ; the 
first and second quills emarginated. The Falconine type. 
1. F. esalon, Gmel.; pl. enl. 44 f., Naum. 2; F. regulus, Pall— 
Beneath, pale rufous, with dark-brown longitudinal spots; tail with 
6-7 bars. Europe, Asia, Africa. 
2. I’. columbarius, Linh., Wils. 15.3.—Beneath, more rufous, 
with dark brown longitudinal spots; tail with four bars. N. 
America. 
3. F. chiquera, Daud., Vaill. 30; Gould, Birds of Himal.; F. ruj- 
collis, Sw. West Afr. Birds, pl. 2.—The upper plumage dark cine- 
reous throughout, with distinct blackish bands. Africa, Asia. 
4. F. femoralis, Temm. pl. col. 12, i. 8343; F. aurantius, 
Lath. Ind. var. y.—The breast black, with fine white bands. S» 
America. 
5. F. tibialis, Shaw; Daud., Vaill. 29 (Normal habit) ; 7. coneo- 
lor, Temm. pl. col. 3830, Swains. W. Afr. Birds, pl. 3; F. ardo- 
siaceus, Vieill, (cinereous var.) —a. Normal habit ; beneath, rufous, 
with oblong spots; the tibial feathers black-brown. — b. Cinereous 
var., entirely cinereous, with black shaft-stripes. W. Africa. 
5. Subgenus Hypotriorchis (part Boie), Kp.— Little falcons 
with very long wings and very short secondaries; only the first 
quill emarginated. The Milvine type. 
6. F. severus, Horsf., Linn. Tr. xiii. 135; F. aldrovandi, Reinw. 
~Temm. pl. col. 128.— Beneath, rufous, young with round black 
spots. Asia, 
7. F. subbuteo, Linn.; pl. enl. 432, Naum. 26.—'Twwo white 
Spots on the occiput; breast and belly white, black spotted ; wings 
and ot banded. Europe, Asia, South and N. Africa. 

