194 
be obferved, that the membranaceous part of 
the trunk has no hair on it, but in its place is 
covered all over with little protuberant pim- 
ples; thefe are tranfparent, and are placed 
there in regular order, and at equal diftances 
from each other, and in fome degree fefem- 
ble the little rifings obfervable on the skin of 
birds when their feathers have been plucked 
off: thefe little parts feem to be in reality 
glandules, which have perhaps a power con- 
fiderably to change the honey that is {wallow- 
ed down, and in fome meafure to forward the 
connection of it. This alfo is to be obferved 
in regard to the ftructure of the griftly parts 
of the trunk, or that which is of a fubftance 
between horn and bone, that in the middle it 
feems to approach nearer to the nature of an 
horny bone, than it does at the fides, which 
are of a little deeper or dusky red colour. This 
part of a fubftance between horn and bone,” 
Tab. XVII. fig. v. &&, does not every where 
tetire outwards from the trunk; for a little. 
below the orifice or mouth of the trunk, it 
tends inwards”, and, uniting with the other 
hairy part of the trunk in a narrower and 
thinner canal as it were, is then carried altoge- 
ther inwards and forwards oo, But.imthe fame: 
place the whole trunk in its circumference 
is then crowded with {mall hairs, like little 
claws a very little bent, which, whether they 
are open canals, or ferve by way of little claws 
or hooks, to keep the trunk during the time 
of fucking in its fituation and place, I will 
not determine ; for as yet I have not fo clear- 
ly difcovered how it is, though I make no 
doubt but it may be found by time and appli- 
cation. That portion of the trunk which is 
of a fubftance between horn and bone, at the 
end of that part where it verges outwards, 
has a globule or little head, which appears 
very remarkable; and in the middle of this 
an opening is feen, which feems to me to pe- 
netrate quite into the cavity of the membra- 
naceous portion of the trunk; neverthelefs I 
now find this opening is not, as I have before 
faid, fo {mall as the apertures of the la¢teals, 
though under a microfcope it may appear fo: 
indeed the beginning of it in this place, in 
proportion to the part, is fo minute and nar- 
row, that fcarce any thing certain can be ad- 
vanced about it to clear up all doubts. In 
Butterflies I am confident that the trunk opens 
with many lips, which imbibing the nourifh- 
ment, appear at the end of the trunk like fo 
many little hairs: but in the Bee a different 
ftructure is obferved ; that little part or dimi- 
nutive head of the trunk, Tab. XVIL fig. v. 
00, together with its little membrane, in which 
the hairs are fixed, is able to contract itfelf 
into a narrower compafs, and likewife to move 
itfelf inwards, as is manifeft if this part be 
touched and examined at different times, and 
efpecially if it be carefully examined in the 
younger Bees, and then in the more perfect. 
I have reprefented this in the form wherein I 
The BOOK of NA TUR-E; or, 
can fhew it at any time. Further, this portion 
of a fubftance between horn and bone, atthe 
lower part {preads into two legs as it were p> 
-which are connected with the other lower por- 
tion of the trunk: where this connexion is 
made, there are difcovered three more little 
parts of a fubftance between horn and bone 
494% perfectly black like pitch, fhining, and 
Joined to one another by feveral articulations. 
The middlemoft of thefe is the {heath as it 
were of the trunk, within which it at that 
time, when it is not employed in fucking, by 
the help of fome mufcles, is drawn back 
and concealed ; atthe fame time alfo the other 
little parts likewife of the trunk bend them- 
felves, and -retire inwards. Inthis fheath of the 
trunk thofe mufcles alfo are enclofed, which 
belong to the two pair of the articulated little 
parts of the trunk ee. The mufcles next of 
the firft pair of thefe little parts, Tab. XVII. 
fig. v. aa, are placed a little lower, and are im= 
planted with two horny little parts gg towards 
the outfide, of a blackith colour: but the two 
little parts themfelves, together with the fheath 
of the trunk, are joined by four diftin@ articu= 
lationsr7 rr, tothe extremities of the bony 
or horny parts, which together conftitute the 
head of the Bee: fo that the whole fheath,: 
the trunk, and its little parts, are, by the help 
of two {trong mufcles /f moved inwards at 
once ; on which occafion the parts juft de- 
fcribed bend themfelves backwards and in- 
wards, and at the fame time hide, cover, and 
fhut in the fheath. Thefe beforementioned: 
mufcles {f here appear through a little thin 
membrane. ¢, and under this the throat /alfo is 
feen, which, together with thefe mufcles, and 
the membrane covering them, is cut through 
in this figure. 
We come now to the ‘act of fuction, which. 
the Bee performs in the following manner ; it 
gradually draws the griftly part of its trunk, 
or that which is of a fubftance between hotn: 
and bone && from the hairy skin and its divi-’ 
fions, which done, the membranaceous and’ 
wrinkled part of the trunk m is ftretched out 
and made fmooth, but the griftly part is 
diftended arch-ways: when thisis performed by 
the help of the mufcles of the trunk, the am- 
bient air is neceffarily forced out of its place, 
and by the preffion of it the honey is carried 
inwards, and through the cavity of the trunk. 
In Butterflies, on the contrary, this is per- 
formed in quite a different manner; for as 
much as in thefe the trunk is not fingle, as in 
the. Bee, but double ; which alfo, after the 
fuction is ended, is wonderfully curled and 
rolled up together, by numberlefs moft mi- 
nute articulations; fothat Butterflies muft exe- 
cute their fuction in a quite different method, 
namely, by pinching clofe the points of refpi- 
ration, and {welling out their body, they re- 
pel the air, and this being driven out, pufhes 
forward into their trunk the fweet moifture 
for which they gape in fucking. ‘The ane 
this: 
