PALLAS’ DIPPER. 
93 
to inhabit this continent. A specimen from the northern 
countries, communicated by Mr Leadbeater, tirst enabled 
us to introduce it into the American Fauna ; and, almost 
simultaneously, Mr Swainson, in his Synopsis of the 
birds discovered in Mexico by Mr Bullock, announced 
it as occurring* in that country, hut in no other part, 
as he thought, of America. Judging from his short 
description, (and the species does not admit of a long 
one,) we have no hesitation in affirming, that both Mr 
Swainson’s, and that described by Temminck, and 
supposed to have been found by Pallas in the Crimea, 
are identical with ours ; notwithstanding the localities 
are so widely distant from each other, as well as from 
that whence ours comes, which, however, it will be 
perceived, is intermediate between them. 
It has been frequently remarked by us, (and the fact 
is now well established,) that many birds of Mexico, 
entirely unknown in the Atlantic territories of the 
United States, are met with in the interior, and espe- 
cially along the range of the Pocky Mountains, at 
considerably higher latitudes. But it was not to be 
expected that a Mexican species should extend so far 
north as the Athabasca Lake, where our specimen was 
procured. The circumstance is, however, the less 
surprising in birds of this genus, as their peculiar habits 
will only allow them to live in certain districts. The 
case is similar with the dipper of the old continent, 
which, though widely dispersed, is only seen in moun- 
tainous and rocky countries. Though we do not see 
any improbability in the American species inhabiting* 
the eastern Asiatic shore, we prefer believing that the 
specimens on which Temminck established the species, 
and whose supposed native place was the Crimea, were 
in fact American. The two species are so much alike 
in size, shape, and even colour, as to defy the attempts 
of the most determined system maker to separate them 
into different groups. 
The single species, of which the genus Cinclus had 
hitherto consisted, was placed in Sturnus by Linne ; and 
by Scopoli, with much more propriety, in Motacilla . 
