Of Flies i 39 
The uppermofl edge of one of the laminae, with fome 
of the hairs on each fide, is reprefented in fig. 76. 
as it appears a little magnified in the microfcope. Thefe 
bearded briftles, or hairs, are {freight on one fide thereof, 
as fig. 77. thofe on the other fide have hooked beards 
on one fide of the briftle, and {freight ones on the other, 
as fig. 78. both thefe briftles magnified (only fcattering 
and not clofe) are reprefented as they grow upon the 
upper edge of the laminae f t, in fig. 76. and in the 
vein, the hooked beards of one laminae, always lie next 
the ftreight beards of the next laminae, and by that 
means lock and hold each other, and by a pretty me- 
chanifm, brace the laminae clofe to one another. And 
if at any time the vane happens to be ruffled and dif- 
compofed, it can by this eafy mechanifm, be reduced 
and repaired. 
Of flies. 
t ip H E common fly is an object beautifully orna- 
-M, ' ted with a mixture of filver and black, and 
thk h briftles, pointing from its head towards 
the m its head are two large hemifpherical eyes, 
err. wred with fnver hairs, a wide mouth, an hairy 
trii’ and a pair of fhort horns. Its trunk has two 
pa ts folded over each other, and fheathed in the mouth, 
vvnofe extremity is iharp. In thofe flies which are of 
a light colour and more tranfparent than others, the 
'motion of the inteftines may be plainly fren, and alfo 
the motion of the lungs, as they alternately dilate and 
contract themfelves. 
In general, the female fly is fupplied with a move- 
able tube at the end of her taij, by the extenfion 
D 4 
