120 
double row of closely packed eggs, as shown in the accompanying illus- 
tration (Fig. 12), the cluster comprising about forty-four. eggs. No 
enveloping membrane again was apparent. The individual eggs were 
considerably narrowed by lateral compression of the abdominal joints 
toward the inner and smaller circumference of the semicircle, and all 
of them plainly showed the segmentation of the future insect, the more 
developed being just ready to burst from the enveloping shell. The 
individual eggs are a trifle over 2 millimetres long, and the egg-cluster, 
in longest diameter from tip to tip, is about 8 millimetres. The eggs 
were not all of the same color, the more mature being darker than ~~ 
the rest. | 
These two specimens, with the additional facts obtained on the repro- 
ductive habits of the insect, confirm the viviparity of this insect. 
In. the case of the specimen collected by Mr. Guttenberg the only 
living young had been deposited by the female, and there is very little 
question that some of the eggs afterwards extruded were defective 
and would not have produced living young. All the evidence seems 
to point to the fact that the young hatch within the abdomen of 
the female. The shell of the egg is a very delicate 
affair and after the hatching of the young becomes 
. amere shred, and in the first specimen examined no 
= trace of a case could be found after hatching. Yet 
“=< 4 more careful examination of the mass contained in 
_) the second specimen sent by Dr. Gissler shows that 
%@/ there is a partial case or covering of the mass. The 
~ genital pouch, which is formed by the folding back of 
the external integument far into the interior of the ab- 
OR domen, is rather larger in this species than in other cock- 
Fig. 12. Panchlora viri. TOaches so far as known, and the invagination extends 
dis: egg mass—en- back through rather more than two segments. The 
targed (original). young hatch within this vaginal chamber, whichis large 
enough to afford space for their movement and post-natal development. 
The eggs developed in the twin ovaries are matured in couples and 
_ passed out into the vaginal space. The typical egg capsule or odtheca 
of other roaches is, according to Miall and Denny, formed about the 
eggs within the vaginal pouch from a fluid secreted by the many- 
branched colleterial glands which open into the under side of the uterus 
near the extremity of the latter. This egg-capsule is practically want- 
ing in Panchlora viridis and can be detected only by very carefully 
dissecting the egg cluster, when a thin membranous sheath is found 
to inclose the inner or basal half of the mass or about one-half the 
length of the eggs. Judging from this rudimentary nature of the egg 
capsule, if this partially inclosing membrane may be so styled, the co}- 
leterial glands must be much reduced or almost wanting in Panchlora. 
