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It very much refembles the European fwallow, 
but the tail differs, as the forks (in the Senegal fpe- 
cimen) taper from the top of the two exterior fea- 
thers to the bottom, at three regular divifions r 
whereas in the European they are nearly of the fame 
width throughout. 
The convincing proof, however, that the “ Hi- 
“ rondelle a ventre roux du Senegal” differs from 
our chimney fwallow is, that the rump is entirely 
covered with a bright orange or chefnut, which in 
the European fwallow “ is of a very lovely but dark. 
“ purplifh blue colour 
Having lately looked into Ariflotle’s Natural Hi- 
ftory, with regard to the cuckow, I take this oppor- 
tunity alfo of enlarging on the doubts I have thrown 
out, in relation to the prevailing notion of this bird’s 
neftlings being hatched and fed by fofter parents. 
I find that this mod general opinion takes its rife 
from what is faid by this father of natural hiftory,. 
in his ninth book, and twenty-ninth chapter. 
Ariftotle there afferts, that the cuckow does not 
build a neft itfelf, but makes ufe moft commonly of 
thofe of the wood-pigeon, hedge-fparrow, lark, 
(which he adds are on the ground) as well as that of 
the yX copig_ which is in trees. 
Now, if we take the whole of this account toge* 
(her, it is certainly not to be depended upon ; for 
the wood-pigeon j and hedge-fparrow do not build 
upon the ground, and no one ever pretended to have 
* See Willugbby, p. 31-2. 
f The is rendered luteola ; but, as there is no defcrip- 
tiou, k is difficult to fay what bird Ariftotle here alludes to;. 
Zinanni fuppcfes it to be the greenfinch. 
X The wood-pigeon, from its fize, feems to be the only 
bird which is capable of hatching, or feeding, the joung cuc- 
tound. 
