4° Of the Feet of Flies , &c. 
of which fhe can convey her eggs into convenient 
receptacles, fuch as may afford a proper nourlfhment 
to the young. From thefe eggs proceed minute maggots 
or worms, reprefented in fig. 79. which after feeding 
voracioufly for fome time, arrive to their full growth, 
and are transform’d into little aurelias, as in fig. Bo. 
whence after a longer fpace of time, they iffue forth 
perfedt flies, as fig. 81. 
Of the feet of flies, &c. 
F IG. 82. A, is a microfcopic reprefentation of the 
foot of a fly, in which is feen three of its joints, 
the two talons, and the two fkinny palms or foies in 
a flat pofture. Fig. 82, B, {hews only one joint, the 
talons, &c. in another poflure, which is fo admirably 
and curioufly contrived, as to enable the flies to walk 
againfl: the Tides of glafs, and to fufpend themfelves 
under the furface of a ceiling, with the greatefl: Teem¬ 
ing facility and firmnefs. The two talons A B, AC, 
are very large in proportion to the foot; the biggefl: 
part of them from A to 11 , is all hairy, their points 
C and B fmooth, and bending inwards. Each of thefe 
talons are jointed at A, fo that the fly is able to open 
and fhut them at pleafure: the claws readily enter the 
pores of moft fubftances, at which time, as the fly en¬ 
deavours to fhut them, the claws C B, do not only 
draw towards, but fix each other; and alfo draw the 
whole foot G G A D D forward ; fo that on a foft body, 
the points G G G G (of which the fly has about ten 
to each foot) enter. This is fenfible to the naked 
eye, in the feet of a chaffer, and if you fuffer him 
1!' 
to 
