YELLOW-BILLED COOCAL. 
185 
particularly strong on the under surface of the tail. 
The whole of the under plumage is of a graduated 
tint of greyish cinereous, commencing with being 
very light on the chin, and ending with being very 
dark on the belly and thighs ; the under tail-covers 
are like the upper, and the feet are black. 
Total length, about 13g inches ; bill, from the 
gape, l^j ; wings, ; tail beyond, 7 ; ditto, from 
the base, 9 ; tarsus, 1. 
SENEGAL LARK-HEEL. 
Centropus Senegalensis , Illiger. 
PLATE XX. 
Above rufous ; beneath cream-white ; head above, ears, neck, 
and tail, greenish-black ; tail-covers above brown ; beneath 
pale testaceous with obscure transverse bands. 
Cuculus Senegalensis, Linn. Auciarum, PI. Enl. 332 Polo- 
philus Senegalensis, Leach in Gen. Zool. 9. 1. 53. — Le Coucal 
Hou-hou, Le VaiU. Ois. d'Af. pi. 219. 
It appears that this well known bird, of which, how- 
ever, the only possible figure existing is that of Le 
Vaillant, extends its range in an eastern direction 
from Senegal to Abyssinia, where it was observed by 
Mr. Salt* to be “ common in the mountainous dis- 
tricts, generally found sitting in the thick caper and 
other thorny bushes, whence it is difficult to drive it ; 
* Travels in Abyssinia, App. iv. 46. 
