Anatomy and Life-History of Pyrops candelaria. 17 
the lobes secrete, is about eicht times the length of the abdomen, 
and is colourless. The pair of accessory glands (Ag) is each about 
sixteen times the length of the abdomen, and of a tallowy white. 
The vasa deferentia and accessory glands unite at the same point 
to form the ejaculatory duct (De) which, near the penis, enlarges 
into a flask-shaped vessel whose rapidly narrowing neck enters a 
short tubular part at the top of the penis-guide, and so into the 
duct of the penis. This latter is a complicated structure, having a 
pair of chitinous but flexible, transversely ridged, distensible sacs, 
one on each side of the penis and forming the walls of the duct 
and exterior walls of the organ. The whole penis is capable of a 
slight endwise motion on two slightly curved, chitinous and hard 
guide-rods which project one on each side, from the tubular penis- 
guide. The sacs are perhaps dilated by blood-pressure, and aid in 
holding the female during copulation (see Fig. 15 and 18). 
The female has ten tubes in each ovary (Fig. 13 and 16 Ov), 
much ramified by fine tracheae; the two ovaries extend upwards 
and forwards slightly within the thorax, where the ends meet and 
are tied together with ligaments and tracheal capillaries. Bach 
ovary discharges into the common oviduct by a curved tube 
(Fig. 16 Ovd), and just beyond the junction of the two oviducts is 
a small pair of globate accessory glands (Ag), one on each side. 
On the anterior wall of the common oviduct and between the pair 
of accessory glands is the spermatheca (Sp), consisting of a globate 
vessel emitting from the end a tube with one turn in it, beyond 
which are two dilatations close together, the anterior and smaller 
one emitting two slender ducts, each of which farther on branches 
into three long and very slender tubes which lie tangled up between 
the body of the colleterial gland and its large neck. Some distance 
behind the spermatheca, the neck of the colleterial gland opens 
dorsally into the oviduct; this gland is a large flask-shaped rather 
chitinous sac (Üg), lined over the interior with large secretory 
cells, the interior of the large duct or “neck” leading from the 
gland into the oviduct being thrown into longitudinal chitinous folds. 
In its natural position the colleterial gland, by means of its long 
neck, lies doubled. over on the top of the oviducts and other organs. 
Behind the colleterial gland the common oviduct continues as a 
large and nearly straight passage to the Vagina (Vag). On each 
side of the vaginal orifice is a little, hard, chitinous, four-fingered, 
palm-like piece, which perhaps corresponds to the parts of Lepidoptera 
