INSTRUMENTAL MUSIC. 
65 
G«. 
Ap - XIII. 
e °ies ig known to make a humming noise whilst 
bin] 1 ' 11 ” ^ le ^ ema ^ e - 54 I n a widely different group of 
j. s ’ Namely the Humming-birds, the males alone 
y Cer tain kinds have either 
M ..° s ^afts of their primary 
Of* 1 ? '^ ea th e rs broadly dilated, 
re webs abruptly excised 
Waida f ' 10 extremity. The 
fits 6 ’ l<>r llls 1 ail °e, of Selaspho- 
h * **"' 
8 & a tycereus, when adult, 
fe a t ]^ 10 ^ lst P rimar y wing- 
as 
thi aer (fig. 44), excised in 
fanner. Whilst flying 
aial- ,^ ower to flower ho 
did ' 68 " a s ^ n 'fi’ almost whistling, 
Fig. 44. Primary wing-feather of a 
Humming-bird, the Kelasphvrus pla- 
iner us (from a sketch by Mr. Salvin). 
Upper figure, that of male; lower 
figure, corresponding feather of fe- 
male. 
noise 
;” 65 hut it 
t; 11011 appear to Mr. Salvin that the noise was iuten- 
1 dade. 
in several species of a sub-genus of Pipra or 
^akin, the males have their secondary wing-feathers 
rein as d escr ihed by Mr. Sclater, in a still more 
deli a . r ^ a ^ e manner. In the brilliantly-coloured P. 
e *osa the first three secondaries are thick-stemmed 
(fil CUlVe( i towards the body ; in the fourth and fifth 
auT a ) the change is greater ; and in the sixth 
“ e Seveu, h (b. c) the shaft “ is thickened to an 
^ho J a ° rdinar y degree, forming a solid horny lump.” 
Pari s ar ^ 8 a ^ so are g re atly changed in shape, in eom- 
011 with the corresponding feathers (d, e,f) in the 
Even the hones of the wing which support. 
tl)£§£ 
Sln gular feathers in the male are said by Mr. 
Ser to be much thickened. These little birds make 
*4 j 
55 Qo(n ' Birds of India >’ vo1 - iU - P- 618, 621 ■ 
'Hoc 7 * Introduction to the Trocliilidoe,’ i 
V 0L “ l0 S- *».' 1807, p. 100. 
1801, p. 49- Salvin, 
