Of the Gnat, fg 
are thrufl into the flefh of animals either fucceflively or 
in conjunction, the blood and humours of the adjacent 
parts muff flow to, and caufe a tumour about the wound, 
whofe little orifice being clofed up by the compreflion of 
the external air can afford them no outlet. When a 
gnat finds any tender juicy fruits, or liquors, fne fucks 
up what fhe likes through the outer cafe, without ufing 
the darts at all; but if it is flefh, that refills her efforts, 
fhe flings very feverely, then fheaths her weapons in 
their fcabbard, and through them fucks up the juices 
lire finds therein. Upon diffedfion many curious things 
may be difcovered, viz. numberlefs animalcula in the 
femen of the male °, and in the female a furprizing 
quantity of eggs. 
There is a kind of gnat which lays its eggs frequently 
in dead beer, &c. and feme time after this the maggots 
are fo numerous, that the whole liquor feems to be alive, 
being full ot maggots 3 the larger fort being the offspring 
of this gnat c 3 and the imaller that of a final! dark 
coloured Ay, tending to a reddifh colour, frequent in 
cellars and fuch obfcure places 3 they turn to aurelia, 
and the larger fort from that to a gnat of a brown colour. 
The chief difference between the male and the female is, 
that the male is leaff, hath a flenderer belly, and its podex 
not fo lharp as the female’s is. This gnat hath no fpear 
in its mouth. 
Thefe infedfs may be applied to the univerfal ipicrof- 
cope, by pinching them between the nippers, or flicking 
them upon the point 3 their ftings when cut off may be 
bell examined upon a glafs Aider when placed on the 
ifage. 
- Nat. Tom, iv, p. 22. c Phy, Theo. p. 386. 
Of 
