197 
C. Size similar; length 10-11 in. (Sub. gen. 
+*300. 
300a. 
Erythropus Brehm). 
Falco vespertinus vespertinus Linn., S.N. 
ed. <xi, “i., p: 129 (1766). [“Ingnia 
=Prov. St. Petersburg.| 
Red-footed Falcon. 
”) 
Wing 3 243-250, 2 247-253 mm.; sexes 
dissimilar ; g$ above dark plumbeous ; tail 
black ; below blue-grey with faint blackish 
shaft-stripes ; thighs, vent and under tail- 
coverts chestnut; under wing coverts 
greyish black; cere and feet brownish 
red ; 2 head and neck rufous ; above ashy 
grey, barred with darker grey ; primaries 
barred with reddish white on inner webs ; 
throat and cheeks reddish white; below 
rufous. 
Falco vespertinus amurensis Radde, Reisen 
io voneO- obit, di.,.p. 102, pl. 1, figs.2, 
(1863). [Amur.] 
Eastern Red-footed Falcon. 
Smaller; wing ¢ 235-245 mm.; ¢ under 
wing-coverts pure white, instead of greyish 
black ; feet orange ; 2 head browner and 
below pale rufous, the breast white, broadly 
streaked with black, becoming bars on 
the flanks. 
D. Larger ; length 17-19 in. (Sub. gen. Notofalco 
301. 
Math.). 
Falco subniger subniger Gray, Ann. Mag. 
N.H. xi., p. 371 (1843). [Hab. unknown 
=Victoria, apud Math. } 
Black Falcon. 
E. and C. 
Europe, N. to 
Sweden and 
Archangel ; 
W. Siberia! to 
Lake Baikal and 
Lower Lena ; 
Asia Minor ; 
cas. Brit. Isles ; 
in winter S. to 
S.W. Africa. 
Siberia, E. of 
Lake Baikal, to 
Manchuria, 
N. Chinas 
in winter to 
N.E. India and 
S. and Es Ainica: 
Australia. 
1 Hartert considers F. v. obscurus Tschusi from W. Siberia to be a synonym 
