Mr. H. Seebohm on the Genus Cursorius. 
119 
typical form holds a position intermediate (at least in colour) 
between the other two. It is a resident in South Africa 
as far north as Damara Land and the Transvaal; but as 
Heuglin records an example from the White Nile (though 
the exact locality is doubtful) it may also occur throughout 
Central Africa. 
HartlauVs Courser is only a pale form of LevaillanPs 
Courser and is also slightly smaller. The feathers of the 
upper parts are margined with nearly white instead of buff, 
and the ground-colour of the underparts shows the same 
difference. It inhabits Benguela, meeting the typical form 
in Damara Land, where intermediate forms are found. 
Fischer’s Courser was discovered by the traveller whose 
name it bears, in Massai-land in Eastern Equatorial Africa 
(Journ. f. Orn. 1884, p. 178), and has recently been procured 
a little to the north-east by Mr. Lort Phillips in Somali¬ 
land (Shelley, Ibis, 1885, p.416). Like HartlauVs Courser, 
it is slightly smaller than the typical form, but varies from 
it in the opposite direction. The buff shade is so dark that 
it approaches pale chestnut, and the white of the upper tail- 
coverts is suffused with buff. On the other hand, it resem¬ 
bles HartlauVs Courser in having the dark shaft-lines on the 
throat less distinct, becoming almost obsolete on the upper 
throat. 
11. Cursorius bitorquatus. 
JerdoVs Courser is the only species of this genus which 
combines the characters of having a plain brown mantle and 
patches of white near the tips of the first- three primaries. 
It appears to have a very limited range, having only been 
found in that part of the Indian peninsula which lies be¬ 
tween one hundred and three hundred miles due north of 
Madras. 
12. Cursorius ^egyptius. 
The Black-backed Courser may always be recognized by 
its plain black mantle and scapulars. 
It inhabits West Africa and the valley of the Nile. 
It has been placed by most writers in a genus by itself 
