246 AN A TI D E.
the end of the wing nine inches; the first and second quills
feathers very nearly equal in length, but the first, rather'the
longer óf the two.
The head and neck of the female is of a dark brown
colour; the beak lead colour; around the base of the beak
in old females,, a broad band of white ; the lower part of the
neck and breast dark brown ; the back and scapulars light
grey, transversely barred with irregular dusky lines; the
greater quill-feathers; dark brown;. the secondaries white,
tipped with dark brown i the tail-feathers also dark brown ;
the belly dirty white; under tail-jcoverts dusky black; the
legs and toes dusky blue, the webs black. The sfémale J s
nearly as large as the male, and from the broad white band
occasionally to be found around the base of the bill, has been
figured and described as a distinct species under various
names.'
Young birds resemble the females,•'■generally, but the light-
colour on the back is varied with brown spots.
The trachea of the male measures' ninejnches in length, the
diameter of the tube of large size throughoutfthe upper three-
fourths of its length, then tapers gradually -to t^e junction,
with the tympanum ; the view given below represents . the'
surface on- the left side of the bird when in i t e natural situation.
The tracheal tube of the female is small, and of
equal size.'throughout its whole length; the diameter like
that of the male a’t the smallest part.
NATATÖRES. ANATIDÆ.
T H E AMERICANS £ 0A U P .
FuUgma mariloid.es, - ÆiHwicaT], Scaup. Vidons, Zodligy of Captain Beechey’s
31, note. -
I am .indebted to, the k-indnessi of-, my friend, Mr. Henry
Dqublëday;Üfpr the opportunitypf figuring , and describing a
duck very elo'sely alliedcytegtpur Scaup: ; differing from it, in-
deed, s.o little, that it has bejen doubted, ;by good authority,
whether éfeej&gKt? to* be: considered otherwise than as a variety
only. Since this:specimen has been in my possession, for my
use in this-work, i t has ! been examined in comparison with
the true Seahp ;by several .ornithological friends, who believe,
with Mr. Doiibleday and myself, that it is Entitled to be
described as distinetjjand I have, therefore, applied to it the
spécifie term màriloides, a s. mentioned by the late Mr.
Vigors', in a quotation to be hereafter noticed. The British