30 RAPTORIAL BIRDS 
female birds being much less rufous, especially about 
the head and breast. This species inhabits the East- 
ern Countries of Asia, and also occurs in South 
Eastern Africa, where it appears to replace the western 
species, with which, however, it sometimes consorts 
when it crosses the African Continent, and meets the 
migratory flocks of its western congener in Damara Land. 
The eastern Red-footed Hobby is a rare bird 
in European collections, and was figured in the 
“Ibis” for 1868, from specimens in the Norwich 
Museum. ‘The succeeding genus, Polthierax, con- 
tains but two species, one of which (Polihierax semitor- 
guatus), a native of tropical and Southern Africa, is 
remarkable for its very small size, and elegant plumage. 
The Norwich Museum possesses a pair of these beauti- 
ful and scarce birds, which were obtained in Namaqua 
Land, South West Africa, by the late Mr. C. J. 
Andersson. 
Diminutive as is this smallest of the African Fal- 
cons, it is surpassed in this respect by the four species 
of Dwarf-Falcon which constitutes the genus Azerax, 
and which inhabit the south-eastern countries of Asia, 
and some of the Islands of the Indian Ocean. 
These beautiful little Falcons are the smallest of the 
diurnal birds of prey ; but notwithstanding their lilipu- 
tian dimensions, they are able to capture and destroy 
the small birds which, with various insects, constitute 
their food. 
The next genus, salon, contains two species, one 
