156 
J. BRONTE GATENBY. 
some cases degenerate, but evidently still living yolk cells 
can be found in the gut of the young larval parasite. 
In degeneration the nuclei become hy perch romatic, large 
stainable masses collecting in both nucleus and cytoplasm, 
the cell finally becoming a black shapeless mass. I am 
inclined to believe that the large cells forming the serosa 
also live longer than the ordinary embryonic cells, after the 
Trichogramma embryo lias been developing some time. 
The Ovarian Egg when Ready to be Laid. 
In PI. 11, fig. 9, a longitudinal section of the nearly mature 
ovarian egg is drawn. The egg is of an elou gated oval 
shape, the anterior pole (J..) being somewhat broader than 
the posterior, and the cytoplasm appears homogeneous except 
for the occurrence at the posterior pole of a large dark 
mass ( G.G.D . ), the so-called germ-cell, or germ line, deter- 
minant. The probable nature, mode of appearance, and the 
fate of this protoplasmic inclusion will be dealt with under a 
separate heading. The follicle cells are much drawn out in 
PI. 11. fig. 9, and it is very difficult to distinguish between 
the wall of the ovary and the follicular layer. The nucleus 
lies slightly towards the anterior yolk of the egg in the mid 
line. It consists of a large condensed mass of chromatin 
surrounded by a clear nucleoplasmic zone. In the latter 
minute stainable granules may be found. The manner in 
which this condensed form of nucleus is produced is, as far 
as I am able to judge from my material of adult insects, the 
same as that described by Hegner for Copidosoma (3). 
The Newly Laid Egg. 
In the eggs at this period I have found a small body near 
the surface, which, I think, is the spermatozoon. In PI. 11, 
fig. 10, this darkly staining body is seen to be surrounded by 
a number of small granules. I have been unable to find any 
signs of activity around this body as one would expect if it 
