INSECTS. 265 
many Hemiptera heteroptera there are seven, as also in many Cara- 
bict ; the Cockchafer and other Lamellicornia have six, the Stag- 
Beetle (Lucanus cervus) twelve, &c. The length of these tubes is 
different, but on the whole is more marked in proportion as the 
number is fewer, as in the Butterflies; they contain the eggs in a 
string; the largest and most developed are at the lower end, the 
smaller above. Here the ovarial tubes run out into a fine thread 
which Lton Durour terms Suspensory Ligament, whilst J. 
MUELLER considers the parts to be vessels which connect the ovaries 
with the dorsal vessel. In most instances the threads unite on 
each side to form a cord; in others (in Phasma ex. gr.) they 
proceed separately to the dorsal vessel. 
From the inferior termination of the ovaries proceed two oviducts 
(tubce), which coalesce to form a common tube beneath the rectum: 
itis ordinarily much shorter than the twbe ; in the cockchafer, on the 
contrary, it is longer than these. Different horny plates surround the 
dilated inferior termination of this common tube; it has a sphincter 
muscle to contract it, as well as several others!. Generally it falls, 
with the rectum, into a common cloaca, or it opens beneath and 
in front of the anus. Sometimes the external sexual organs of the 
female, generally seated in the ninth ring of the abdomen, which is 
included and hidden in the eighth, are prolonged into an appendage 
externally. Here belongs the tubular vagina of Flies (vagina tubi- 
formis), in Chrysis, &c.?, which is formed of the last abdominal 
rings that can be drawn within each other like an opera-glass. In 
others the vagina is two-valved (vagina bivalvis), as in Locusts 
(Locust), and projects beyond the last segment of the abdomen as 
an ensiform compressed prolongation. In others there is a per- 
forator borer (terebra) or a sting (aculeus) ; here, besides the bi- 
valved vagina, there is a sharp organ for puncturing, with serrated 
edges, and composed of one or of two horny threads; when at rest 
the sting is concealed within the abdomen; it is connected with a 
poison-gland%. 
who has given a highly magnified figure of these parts, each ovariwm consists in the 
Honey-Bee of 150 tubes, Bibl. natur. p. 471, Tab. xrx. fig. 3. 
1 See Straus, Anat. des anim. art. p. 299, and the figures of the Cockchafer, 
ibid. Pl. 5, figs. 4, 5 m, Pl. 6, fig. 2 k, k’. 
2 Also in Mycterus curculoides amongst the Coleoptera, Ann. des Sc. nat. Tom. vi. 
Pl ros fie? 5: ' 
3 Comp. here especially BurmEIsTER, Handb. der Entom. 1. 8, 209—213, Taf. 12. 
