Aw cae 
The, FL aS FOUR. ¥ ef EN & BvGyr:s: ist 
with feveral ounces of fperm. Each of thefe 
veficles is terminated by a {mall curled fila- 
ment //, which is indeed divided on each 
fide into fix {mall tubes ; on the tops of which 
are depofited fo many very beautiful little 
plands mm. ‘Thefe being united to thefe 
twelve tubes, by their means fend the feminal 
matter at the time of coition through the 
velicles to the penis. I exhibit fome of thefe 
- glands alfo as they appear 2 when they are 
more {wollen in the middle than in the cir- 
cumferenee, and are there filled with a pellu- 
cid matter, refembling that fubftance in a Hen’s 
ego, which Harvey calls the colliquaneantum. 
But the fubftance which furrounds the middle 
part, is filled with matter like the white of an 
egg when beginning to concrete. Hence it is 
eafy to conclude, that the dusky fluid which is 
found in the veficles is generated therein, un- 
lefs one fhould rather incline to think that it is 
thus changed in the veficles, which fhould have 
been firft proved. The middle part of thefe 
glandules is like a globe cut fomewhat {mooth 
on the top; but if the glandule be inverted o, 
this part appears entirely globular below, and 
the little branch of the veffel united to the ve- 
ficles is there fixed in its center. This I ex- 
hibit fomewhat larger than the natural fize ps 
reprefenting in the fame figure the fubftance g 
that furrounds it; which contains a feminak 
matter much refembling the white of an egg. 
All round thefe glandules and feminal veficles 
are inferted numerous branches of the afpera 
arteria: one would almoft thihk that one faw 
the ciliary du€ts in the human eye. The vefi- 
cles have no communication with the vafa de- 
ferentia, which is likewife the cafe in Bulls 
and many other animals, and even in other in- 
fects, and as particularly in Bees. All thefe 
genital parts are perfectly white, except the 
veficles, which appear gray on account of the 
dusky feminal matter they are {wollen with, 
which is in fome meafure feen through them: 
Thefe little parts are fituated in the lower re- 
gion of the belly, and are there found folded 
or wrapped one with another, in fuch a man- 
ner that at the beginning of the difleGtion one 
would think they could not be difengaged by 
any induftry. But patience overcomes all fuch 
difficulties. I obferve further, that infects differ 
very much with refpect to their genital parts, 
as is plain in the organs of Bees, the water 
Beetle, and others which Ihave occafionally de= 
lineated. Thefe parts are likewife very beau- 
tiful in the Hornet, though I have not yet fuf= 
ficiently examined into their ftru€ture. J fhalt 
now pa{s to the ovary of the female, 
The genital parts of the female Rhinoceros-Beetle. 
2 8 HE female, which is diftinguithed in this 
{pecies by having no horn, Tab. XXX, 
fig. x. a, on its head, fhews on diffection, its 
ovary fituated in the loweft region of the abdo- 
men; but it is found to be fituated higher when 
_ it is diftended with eggs. In order to exhibit 
this the more clearly, I reprefent it, together 
with the head and gullet, and the ftomach 4, 
which is very flender, and the inteftines c, to- 
gether with the orifice d of the latter, which 
opens below and near the orifice of the ovary, 
as they are all naturally fixed among one an- 
other. The ovary ee confifts of twelve ovi- 
ducts, fix whereof are fituated on each fide, 
but thefe afterwards meet in certain common 
paflages, which immediately afterwards form 
one fingle trunk, which may be called the 
uterus or rather the vagina of the creature. This 
trunk reaches to the extremity of the abdomen, 
out of which the female difcharges her eggs 
through the horny ring, which is formed like 
a crefcent, and is fhaggy f in the lower part. 
In one of thefe common duéts is here exhibited 
a perfect egg, and above are feen four other 
rudiments or imperfect eggs, adhering in three 
particular ovidudcts: the other three ovidudts of 
this fide are empty or without eggs, On the 
other fide may be feen three more perfect eggs 
in the oviducts, which otherwife appear very 
clofely contraéted in thofe parts, where I 
have delineated no eggs in them. I diflected 
this female the 17th of Auguft, at which time 
thefe Beetles have done laying eggs, and ever 
the young Worms are by that time found. But 
if the extremity of the vagina which is thagey; 
be examined in the inner part, eight horny and 
bright red little parts, together with the paflages 
that then lead both to the vagina and to the 
inteftinum rectum or ftraight gut, are obvioufly 
-feen. Under the vagina, not far from its exter- 
nal aperture, is feen an oblong or pear-fhaped 
bag, Tab. XXX. fig. x. g, which opens by a 
{mall tube into the vagina. When this bag is 
cut, a yellowifh matter is always found therein, 
which, after it is concreted, runs into {mall 
crumbles, if touched ever {fo lightly: its yel- 
low colour is feen through the bag. What ule 
this {ubftance is of I am yet ignorant. Above 
this bag are found two other tubes, which have 
elofe extremities, and unite in one fhort ahd 
narrow tube, which is likewife inferted in the 
vagina, One of thefe little parts 4 in the Bee- 
tle I diffected was pellucid, like a lymphatic 
veffel, but the other was very white 7, nervous 
and hard. ‘The ufe of thefe little parts likewife 
is altogether unknown to me. One may alfo 
fee here, in what manner all thefe parts are 
furnifhed with numerous pulmonary tubes, out 
of which iffue many pneumatic veficles or blad~ 
ders, which likéewife emit other tubes & &, 3c. 
Thefe pipes connect the oviduéts, ftomach, 
inteftines, and all the reft of the parts here de- 
lineated firmly together, fo that they cannot be 
difengaged but by repeated efforts. There is 
a kind 
