100 EDW, JACOBSON, PLANIPENNIA FROM JAVA. 
imago casts off the pupal skin, which is always found to 
protrude halfway out of the trapdoor. The pupal stage lasts 
from 2 to 3 weeks. After the pupa has turned into an imago, 
the larval excrement is expelled in the shape of a pale grey 
bar of 3 mm. length. 
Although I often kept pregnant females in confinement, 
I neer observed the deposition of the eggs. Mature eggs, 
which I took from the ovaries of female Myrmeleons, had a 
length of 1!/; mm. and a diameter of */, mm. Their shape 
is oval and the colour of a light yellow hue. 
Chrysopa jacobsoni v. d. Weele. 
I reared this species from the egg at Batavia in October 
and November, and the metamorphosis, as described below, 
will probably be similar for all the other species of the 
genus Chrysopa. 
I found a batch of 21 eggs fastened to a bamboo stick on 
the 7' of October. As usual with Chrysopa-eggs, they were 
planted on long stalks, consisting of a very thin, though 
stiff thread, much resembling the anthers of flowers. The stalks, 
of hyaline colour, are 4 mm. in length and have a diameter 
of 0,1 mm. The eggs, of a light brown colour, are 11’ mm. 
long, with a diameter of 0,3 mm. 
The next day the eggs were attacked by mites, which were 
found to have emptied a number of them. 
The young larvae emerged on the 8" of October. They 
first remained perched on the egg-shells, with the tip of the 
abdomen attached to it, aud the head turned downwards along 
the stalk. These young larvae (see the figure in Dr. van der 
Weele’s paper) have a yellowish red colour, with dark brown 
spots on the body and their length is about 2 mm. Interesting 
are the long antennae, which have the same length as the 
enormous mandibles, the short dactyliform processes on each 
segment, and the long eylindrical pygidium. 
