BLUE-BACKED M^NAKIN. 
yet some authors have ranged the Manakins 
with the Cotingas ; and others have joined 
them with the Sparrows, with the Titmice, 
with the Linnets, with fhe Tanagres, and with 
the Wren. Other nomenclators are more 
culpable, for denominating them Pipra ; or 
for classing them together with the Cock of 
the Rock, to which they bear no analogy, 
except in this disposition of the toes and in 
the square shape of the tail: for, besides the 
total disproportion in size — the Cock of the 
Rock being as large, compared with the 
Manakins, as the Common Hen compared 
with the Sparrow — there are many other ob- 
vious characters which distinguish them ; their 
bill is much shorter in proportion, they are 
generally not crested, and in those which 
have a crest it is not double, as in the Cock 
of the Rock, but formed by single feathers 
somewhat larger than the rest. We ought, 
therefore, to remove from the Manakins, not 
only the Horn- Bills, but the Cock of the Rock, 
and reckon them an independent genus. 
^ The natural habits, common to them all, 
were 
