DEVELOPMENT OF THE GENERATIVE ORGANS. 705 
substance of the ovaria excentrically on their convex surfaces 
near their inner margins. This is more readily observed at a 
later stage, as in the earlier stages the ovaries are so friable 
that only portions of the egg-tubes were seen adherent to the 
extremity of the parovarium. 
The Parovaria are in a very advanced stage of development 
on the seventh day in the pupa. They exhibit two distinct 
parts: a duct lined with small columnar cells, about “5 mm. in 
length, and a glandular portion 1°5 mm. in length, widest 
towards its caecal end, where it is about ‘r mm. in diameter. 
IG, 101.—The oviducts and parovaria on the sixth or seventh day of the pupa. 
J; fat bodies; /, /, ovarian ligaments; 0, Ovary ; ov, oviduct ; #0, parovaria ; 
ry 5, receptacula seminis ; v, vagina. 
This portion of the tube is beautifully transparent, and is lined 
with large glandular epithelial cells, with distinct nuclei, 
similar to those of the fully-developed parovarium. 
The Utero-Vaginal Tube and Oviduct is a pouch of the hypo- 
dermis, and the oviduct exhibits two blind tubze which are con- 
nected with the ovary by delicate bands of peritoneal tissue. 
In some earlier stages which I have seen (Fig. 102), the tube 
are undeveloped and the oviduct is a mere pouch at the 
anterior end of the bursa into which the ducts of the parovaria 
open. 
