Th HISTORY of INSECTS. 
make in thefe inquiries, if they will induftri- 
oufly fearch into them. What I have hitherto 
defcribed and exhibited, are indeed but light 
fhadows of the things themfelves: it would bé 
eafy for ingenious perfons to difcover and lay 
open: all thefe things thoroughly and more per- 
fectly, to the glory of the great God*, As 
to myfelf, I do moft willingly confefs that my 
capacity is fo flender, that Iam able to behold 
the works of God only at a diftance. Nay, 
the more frequently I view them, the more I 
am convinced of my ignorance, and I know 
my own weaknefs and mifery. 
To make what has been hitherto defcribed 
the more intelligible, I fhall add the figure of 
the genital parts of the great water Beetle, in 
which the tefticles are very remarkable for their 
ftructure. 
Tab. XXIL fig. v. a, the penis itfelf, which 
is fituated in the midft between the prominences 
of the horny part, and is inflated and erected in 
coition by the help of the blood. 
56, The horny part of the penis, in the mid- 
dle of which it is placed, and is ftrengthened 
thereby. 
¢ c, The root of the penis formed in the fame 
manner as in the Bee. 
a, The tefticle of one fide, as it appears at 
firft fight, when difengaged from its pulmonary 
tubes. 
ee, The tefticle freed ofits pulmonary tubes, 
fo that its internal ftruéture, which is tubular, 
or confifts of {mall and round filaments, may 
be feen. 
Sj fs The vafa deferentia, wheréof one extre- 
mity, as in man and brutes, iffues out of the 
tefticles, or rather is joined to the tubulated 
filaments thereof. 
gg, The vafa deferentia dilated, or that part 
of them where they fecrete a certain feminal 
matter, as well in manas in the Bee. | 
bbhbbhhbh, The feminal veficles with their 
curled extremities: thefe appear in that part 
not unlike the feminal veficles in man. 
21, Vefiels clofed at their ends, which open 
about the root of the penis, and probably per- 
form the office of proftrata in man. 
Finally, to conclude this hiftory of. the anato- 
my of Bees, Ifhall fubjoin a defcription of the fpi- _ 
nal marrow, and fhall delineate it, and explain the 
figures. All other things which may be further 
faid of thefe infects, fuch as the defcription of the 
bony or horny parts of the Bees, I fhall pafs 
over at prefent in filence; for as the Bees have 
now employed me continually for fome months, 
diflecting in the day time, and writing at night, 
Iam the more inclined to put an end to the 
prefent treatife, though I clearly fee that 
fome parts of this infec may be {till much 
more accurately inveftigated. However, I 
thould fcarce believe that I have committed any 
confiderable errors; therefore J confidently 
fubmit to the cenfure of thofe who have can- 
* This author died before the invention of glafs hives. 
the whole courfe of operations of the Bees carried on in it 
Thefe have been. carried to fuch perfe@ion fince, 
. It is thus we have difcovered their true oeconomy. 
223 
dour, and fhall never refufe to learn better 
things. . x 
The {pinal marrow of the male Bee, ‘Tab. 
XXII. fig. vi. 2, knotted in its beginning, or 
that part of the brain which in the defcription 
of the eye diffeted before, I have faid was 
joined to or continuous with the brain, the cor- 
tical fubftance and tran{verfe fibres. This part, 
which gives origin to the nerves of the eye, is 
very eafily feparated from the parts juft now 
recited, if it be in the leaft handled. I have 
not yet examined how the eyes are conftituted 
in other infects, and in the Silkworm, with 
refpect to the brain or {pinal marrow; I have 
delineated only their nerves as they appear in 
the Worm or Caterpillar, as may be feen in 
the figure which I have before inferted in the 
hiftory of the Rhinoceros Beetle; where is like- 
wife {een very diftin@ly, the nervus recurrens, 
or recurrent nerve; which I have here after- 
wards obferved in the Bee. : 
bb, 1, 2, 3, &c. Shew the feven fubfequent 
little knots of the -fpinal marrow, into which 
the marrow, when it pafles through the breaft 
and abdomen, is dilated. Thefe fame letters 
likewife thew the origination of the nerves from 
thofe parts. 
ccec, Are fome nerves which do not arife 
from the marrow where it is dilated, but from 
the divifion of the two larger nerves which 
conftitute the marrow. 
ddd, &c, Are thofé places where the mar- 
row is divided or opens. This is never feen in 
man, nor in larger animals. 
é, The part of the marrow fituated in the 
head, and that in the neck. The part in the 
neck lies enclofed in a {mall horny part. 
J, The part of the marrow which is placed 
in the thorax, and there principally provides for 
the mufcular fibres that move the legs, wings, 
Sc. ag 
g, The part of the marrow enclofed in that 
natrow horny little part, by which the body is 
joined to the breaft. 
b, The part of the marrow fituated in the 
abdomen, which gives nerves not only to the 
vifcera, but to the mufcles of the rings, and to 
the fting. 
77, Two remarkable nerves diftributed over 
the jaws, and other parts. They are the fame 
that I have before exhibited in’ the ficure of 
the eye. 
& k, Two nerves reaching to the probotcis or 
trunk, ferving probably for the tafte. 
/1, Two other nerves which are conveyed 
into the mufcles of the trunk. I could not yet 
inveftigate the olfactory and auditory nerves in 
this creature. 
mm, ‘Iwo nerves tranfmitted out of the be- 
ginning of the marrow towards the eyes, as I 
think. This, however, I cannot affert for cer- 
tain, as I do not love to deceive either myfelf 
or others, for it isa difficult thing to fee this 
that we can fee 
Matter 
