A Short Explanation of th TABLES. 
pillar, as I have reprefented it lying on its 
belly. : | 
FIG. HU. 
The Chryfahs or Aurelia of the fwift Butterfly, 
belonging to the fecond mode of the third order 
or clafs. 
a The eye. 
6 The probofcis, beautifully bent back towards 
the belly. 
¢ The horns and legs, ftretched over the body. 
d The wing belonging to one fide. 
eé The rings of the breaft, and of the abdomen. 
FTG... UI. 
The fwift Butterfly. 
aa The eyes. | 
6 6 The antennz or horns, growing above the 
eyes. 
¢ The probofcis; confifting of a double tube, 
by means of which this infect conftantly 
fips up its food, while flying. It is to be 
noted that the great length of this curious 
organ is contrived by Nature, that the in- 
fect fhould take its food without being obliged 
to fly too near the flowers, which might in- 
jure its wings. 
d The extremity of the probofcis, coiled up by 
means of fome minute mufcles. ‘Thus the 
Butterfly can gather up this part into a little 
compafs, and hide it between the forks. 
e A fide view.of part of the forks. The forks 
are two particles covered with hairs, formed 
like a feather. - 
JF The tail, by means of which the infe&t, when 
on the wing, fhapes its courfe; fo that its 
flight is fteddier than that of other Butterflies. 
The reft appears behind the head and breaft, 
and the abdomen, which is beautifully 
adorned with hairs, made in form of feathers, 
and of changeable colours. 
gg The upper wings, which are the largeft. 
bb The lower wings. All the four wings are 
curioufly ornamented with hairs and {cales. 
And thefe ornaments, by containing a great 
deal of air, make the Butterfly lighter than 
it otherwife would be, and confequently the 
fitter for flying. 
Bel Gui aly, 
The Sicarius, or Affaffin Worm, an aquatic infed. 
aa Its fix hairy feet. 
&. Its hairy tail, furnifhed, as it were with two 
oars, by means of which the Worm can 
float on the furface of the water. 
¢¢ Sharp and crooked teeth with which this 
infect kills other infects for its food, and 
fucks up their blood. 
dd Hight of the infedts twelve eyes, of which 
fix are at one fide of the head, and fix at 
the other. 
KXXV 
eee Four ariculated briftles growing under, 
and between the teeth. 
Sf Two longer briftles, which may be con- 
fidered as the infects horns. 
g Six breathing holes. This Worm has fix- 
teen. 
By Guy, 
A tooth of the Sicarius, or Affafin Worm, viewed 
} with the microfcope. 
a The point of the tooth, fharp, and crooked. 
6 A fharp ridge on the internal furface of the 
the tooth. 
c The convexity of the external furface. 
d An oblong aperture, or flit, through which 
that infect fucks its food. 
Bal GieoVi. 
The breathing holes of the Beetle, in their natural 
jituation ; as likewife the rings of the body, 
which may be taken from the figure of the 
Nymph already exhibited. 
a1 The firft breathing hole placed obliquely 
backwards in the breaft bone, upon the fe- 
cond ring. 
6 2 The fecond breathing hole, fituated higher 
under the wings in the fifth ring, and in an 
oblique direction to the firft breathing hole. 
¢ 3 The third hole, fituated a little higher up 
on the edge of the abdomen, and in the 
fixth ring, 
d 4 The fourth ftill a little higher up on the 
feventh ring. 
e 5 The fifth higher up again in the eighth 
ring. 
f6 ¢7 68 The fixth, feventh, and eighth 
holes, confiderably {maller than the pre-. 
ceeding ones. They lie on the ninth, tenth, 
and eleventh rings. 
7g The ninth hole, that appeared in the 
twelfth ring, now quite clofed up. 
FIG. VIE and VIE. 
The eyes, optic nerves, and brain of the Beetle. 
a The eye juft divefted of the cornea, and the 
uvea, fo as to fhew its invefted pyramidal 
fibres. 
6 A fnow white fibrous coat of the eye, in 
which all the pyramidal fibres terminate. 
c The optic nerve feparated from the infide of 
the faid coat’s cavity. 
d The dark colour of the faid coat. There 
are in this place a great many ramifications 
of the pulmonary tubes, of which I have 
reprefented three branches. 
e The manner in which the pulmonary tubes 
run along the inverted pyramidal fibres in a 
a ferpentine courfe towards the cornea, in 
the eye of a live Beetle. I have reprefented 
thefe pulmonary piftules, fomewhat thicker 
than 
