A Short Explanation of the TABLES. 
tural fize; The figure underneath repre- 
fents it bigger than nature. 
II. The double coat or fkin of the faid egg, 
left by the Bog-houfe Worm, which at laft 
changes to the Bog-houfe Fly. 
III. The faid Worm newly hatched, a little 
bigger than nature. 
IV. The faid Worm full-grown. 
V. The faid Worm grown immovable, by 
degrees, under its fkin, and changed to 
what I call a Vermiform-Nymph. 
VI. The Bog-houfe Fly itfelf, proceeding 
from the Bog-houfe Worm, after the latter 
has changed intoa Vermiform-Nymph, and 
and caft off two {fkins. 
[Sead al are 
The egg of the Bog-houfe Fly, as tt appears 
through the microfcope. 
angles, beautifully coloured, and teffellated eke 
the Dutch cakes, called Woffels. 
EB isG. i. 
The double coat of the egg, broken by the Worm it 
contains. The external coat is of a fubjlance 
like plaifter; the internal coat, ‘which ts 
thinner, refembles a membrane. 
heG. ie 
The Bog-houfe Worm, as it appears through the 
microfeope, divided into annular fections, and 
ats body beautifully furrounded, as it were, 
with little tufts of feathers. 
BoLGee ly. 
The fame Worm changed into a Nymph, of a frze 
bigger than nature, in order to fhew that the 
little difference, as to external jorm, between 
this Nymph and the preceding Worm, (Fig. 
LIT.) confifis of no more than this, that in the 
Nymph flate the infects fnout is drawn in 
within the head, and all the annular incifions 
of the body are become fhorter than they were 
in the Worm ftate. Add that the infedt, in 
the Nymph flate, is deftitute of motion, where- 
as in the Worm ftate, it was very atlive and 
lively. 
PeasGs Vv, 
The true or real Nymph, concealed within the 
Vermiform-Nymph, (No. V. and Fig. IV.) 
and thence extracted through incifions made in 
the fein. This figure is a little bigger than 
nature. 
Tal Ge aV Isard. VIL: 
The fame Nymph ( Fig.V.) viewed with a 
very great magnifier, the better to diftinguifh one 
Jrom another ; it’s limbs, which are chiefly 
It is oblong, full of 
xlv_ 
exhibited by the feventh Figure, and denoted by 
letters, as follows. 
aa Are the reticulated eyes, between which, 
at the fame time, may be feen the probo- 
{cis, placed towards the thorax. 
6 The two antennz, or horns. 
c¢ The fix legs, folded up on each fide, 
againft the thorax. 
dd The folded wings. 
e The abdominal rings, with the tubercles 
growing on the edge of the abdomen. 
Tae Gres VLDL 
The Bog-houfe Fly, (No. VI.) bigger than nature, 
with its external parts. 
aa Two reticulated eyes, of a purplifh colour, 
and parted by two filver belts or borders. 
6 Two antennz on the forehead. 
¢¢ A pair of wings of a membranaceous fub- 
ftance. 
dddd Six hairy legs, the extremities of every 
one armed with nails. 
e The abdomen, its rings, colour, and hairs, 
Rob Grid xy 
A Another kind of _Bog-houfe Worm, be- 
longing to the fecond mode of the third or- 
der or clafs. This worm is very remarkable 
on account of its legs and horns. 
B The Vermiform Nymph of the Worm, 
from which it differs externally more than 
the Nymph heretofore exhibited, No. V. 
and Fig. IV. 
C The Fly produced by the Nymph, elegant- 
ly covered, by fome prepofteroufly ranked 
amoneft Bees. 
BARC. Ai 
D A white Worm, that grew within the Ca- 
terpillar of Tab. XXXVII. No. III. and 
aftewards, when near its time of mutation, 
opened itfelf a pafiage through the Chryfa- 
lis of the faid Caterpillar, reprefented by 
No. V. of the fame Table. 
E The fame white Worm changed after its 
iffuing from the faid Chryfalis, into a Ver- 
miform-Nymph, that being opened is found 
to contain a real Nymph. , 
F The Fly at length produced by the faid 
Vermiform Nymph, after it has caft its 
fkins. 
dimen Bs. OX XT 
The Hiftory of the Afilus, or Gadfly. 
EtG. ef. 
The Worm from which the Gadfly iffues, hanging 
over the furface of the water. 
@ Twelve annular divifions of the Worm, by 
7 ~ which 
