338 
Dr. Heuglin’s List of Birds 
old nests on rocks and prominent hills along the coast. Once 
on the island of Debir I found a nest on the roof of a de¬ 
serted fisherman’s hut. Another stood on the vaulted ceiling of 
an old cistern near Aualites, in the neighbourhood of Zeila. 
The nest is built of strong dry branches and boughs, is nearly 
cylindrical, from two to three feet high, very strong and solid, 
and above rather flat. The lining consists of smaller branches, 
algce, seagrass, and fungi. Abu-ketaf Arab. 
6. Helotarsus ecaudatus. (A., D.) 
Mountainous districts of Somali. 
7. Falco eleonor^. Falco concolor, Riippell. 
Island of Barakan in the Bed Sea. Old male : of a uniform 
blackish schistaceous grey, with the throat pale, iris dark brown, 
lores and naked space round the eye sulphur-yellow; beak 
bluish-corneous, yellowish at the base; feet deep-yellow, nails 
blackish-corneous. Wings 8 ,f longer than the end of the tail. 
Measurements (taken from fresh birds) : toe 12 n ; wing lO" 2" 1 . 
Younger bird : ground-colour dirty brownish-black ; throat very 
pale. Young : above dark cinereous, margins and tops of plumes 
ferruginous; below rufous with dark longitudinal spots along 
the shafts; throat pale; beard very distinct, dark blackish. 
One adult specimen from Dahalak shows darker stripes on 
the back; but these are not so distinct and well-marked as in 
F. ardesiacus , Y. The throat was in this specimen of a dirty 
whitish colour. 
I found this fine falcon not further north than 16°, on naked 
rocks and coral islands, in the archipelagos of Dahalak, Hanakil, 
Amphila, near Bas Bachemeh and on Bur-da-Rebschi. It lives 
there during the breeding-season (Aug. to Sept.) in pairs, feeding 
upon smaller birds and locusts, of which latter it tears out the 
legs on the wing, like F. rufipes . Both sexes had breeding-spots. 
On the 30th of August I discovered four breeding pairs on a rock 
near the island of Dahalak el Kebir (15° N.L.), and found three 
nests, which were placed very artlessly on the rocky precipice. 
One contained three, the two others each two eggs. In size and 
colour the eggs were intermediate between those of F. cesalon and 
F. subbuteo . Bonaparte (judging from his description of this 
