APPENBIX L. 157 



both sexes of T. rupicoloides and also the female of T. alau- 

 darius, the general coloration of these parts corresponding 

 more nearly with the latter than with the former. It also 

 resembles T. alaudarius and differs from T. rupicoloides in 

 the absence of rufous spots or bars from the outer web of the 

 wing-feathers ; but it resembles T. rupicoloides in having the 

 upper tail-coverts banded with alternate transverse bars of 

 dark and pale grey more distinctly than is the case in the 

 great majority of those females of T. alaudarius which 

 exhibit a cross-barring of that description ; each feather on 

 these parts has also a dark shaft-mark. In the markings of 

 the tail it resembles the less adult specimens of T. rupico- 

 loides J these markings consist of six blackish-brown bars, 

 with the tip and the interspaces whitish brown, the latter 

 being much tinged with grey on the basal moiety of the 

 central rectrices. On the under surface of the Mombasa 

 bird its similarity to T. rupicoloides is remarkable; the 

 feathers of the jugulum and upper breast are pale brown, 

 with the dark shaft-marks much narrower than in the female 

 of T. alaudarius, and even narrower than in some specimens 

 of T. rupicoloides; these marks are continued down the 

 centre of the lower breast, the ground-colour of which, as 

 also that of the flanks, is somewhat darker and more rufous 

 than that of the jugulum ; the flanks are crossed with eleven 

 dark transverse bars, of which there are either two or three 

 on each feather of these parts, reaching quite across it ; these 

 bars closely resemble those on the flanks of the adult T. rupi- 

 coloides, but are a little narrower; the abdomen, tibise, and 

 crissum are pale white, tinged with fulvous, and, with the 

 exception of the crissum, exhibit a few minute dark spots ; 

 the axillaries are less coarsely marked than in the female of 

 T. alaudarius, and are in this respect more like those of 

 T. rupicoloides ; and the same remark applies to the under 

 wing-coverts, though in many specimens of T. rupicoloides 

 these are immaculate, which they are not in the Mombasa 

 Kestrel, the latter, like some individuals of T. rupicoloides 

 having this portion of the plumage sparsely variegated with 

 narrow shaft-marks. 



