539 
Birds of Southern Cameroon. 
Nests with eggs or young were found in the months of 
August^ September; and October. 
Nine eggs have been collected. The smallest of these, 
No. 287 (fig. 2 in the Plate); measures 22 x 16 mm. ; No. 289 
(fig. 1) measures 2 7 x 18 mm. ; another is 26*5 mm. long. 
These measurements give the extremes. 
[Eggs of this species vary in shape from a long rather 
pointed oval to a wide regular oval; they have little or no 
gloss. The ground-colour is pale blue, pale greenish-blue, or 
in one instance creamy-buff. In some examples the markings 
are more or less regularly distributed all over the shell, in 
others they are mostly confined to the larger end, where they 
form a dense cap or broad zone. The surface-markings are 
reddish-brown or yellow-umber and the shell-markings are 
bluish-grey or lavender-grey.—-O. G.] 
Dryoscopus senegalensis. [Seso.] 
Sharpe, Ibis, 1908, p. 332 ; Reich. V. A. ii. p. 592. 
Dryoscopus tricolor Sharpe, Ibis, 1908, p. 333. 
Nos. 4398, 4484, 4528. All $ adult. Bitye, R. Ja. 
No. 4776. ? . Bitye, R. Ja. 
No. 3030. nestling. Bitye, R. Ja. 
The varying shades of black, grey, and white on the backs 
of females of this species has caused much perplexity. 
Sharpe recognised (doubtfully) two species among my birds, 
and Neumann thought there were two species found in 
Cameroon, in which the males were alike, only the females 
differing. My large series of specimens, including those 
listed above, together with those in the British Museum 
from former collections, contains many adult males, but 
all with glossy black backs and wings and pure white 
rumps; while the females differ in all degrees, from those 
with grey backs and wings and light grey rumps, to one 
almost like the male on the back and rump. It is not 
unreasonable to suppose the last was an old female, and 
that as females advance in age they become more like the 
males in plumage. 
