73. =Lower= (_inferiores_) those below; sometimes concealing or
projecting beyond the tail.
NOTE.—_Tegmina_ (73½) are coverts in general, whether of wing or tail.
_Calypteria_ are tail coverts. _Tectrices_ (83), wing coverts.
F. The Wings (_Alæ_).
74. =Wings= (_Alæ_). The anterior pair of limbs of the bird, used in
flight.
75. =Primary quills=, or =quills of the first series=; =Hand-quills=
(_Remiges primariæ_). The (usually) ten stiff feathers inserted on
the hand or first joint (metacarpus and digit), or from the bend of
the wing to the tip.
76. =Secondary quills= or =quills of the second series=;
=Arm-quills= (_Remiges secundarii_; _Pennæ cubili_). The inner
quills, or those inserted along the posterior edge of the forearm
or cubitus. The innermost of these quills, sometimes longer or
different from the rest, are frequently called tertials. (_Pennæ
tertiariæ._)
77. =Bend of the wing= (_Flexura_, _Plica_). The angle of junction
of the hand-joint and that of the forearm.
78. =Armpit= (_Axilla_). The under side of the insertion of the wing
into the body.
79. =False= or =Bastard wing= (_Alula_). A series of several
stiffened feathers on the edge of the wing, overlying and exterior
to the primary quills, and inserted on the thumb joint of the hand.
80. =Scapulars= (_Pennæ scapulares_). Stiffened feathers inserted on
the shoulder-blade or the insertion of arm (_humerus_), and filling
up the interval between the secondary quills and the body.
81. =Axillars= (_Pennæ axillares_). Similar feathers connecting the
under surface of the wing and the body, and concealed in the closed
wing.
82. =Speculum=, or =Mirror= (_Speculum alæ_). A brilliantly colored
portion of the wing especially in the ducks, over the extremities of
the secondary quills, and framed in on one side (in the closed wing)
by the primary quills, or the other by the scapulars.
83. =Wing coverts= (_Tectrices_). The smaller feathers of the wing.
The