Go- 
ase 
a 
PIMPLA sp. 
Plate XX, fig. 3. 
References :—Determined as an undescribed species of Pimpla by Dr. W. H. 
Ashmead, of the U. S. Museum. 
Classification :—Order, HYMENOPTERA. Family, Ich neumonide. 
Parasitic upon Hyblza puera, var. nigra, Steb. 
Description. 
Resembles the last to some extent. The fly is slender, elon- 
gate, blackish. The body in the female, one of which is shown 
in Plate XX, fig. 3, terminates in a longish exserted ovipositor. 
Life-Hts tory. 
This fly was bred by the writer from the same set of cater- 
pillars as the Glypta, and its dates of pupating and issuing 
are much the same as the other. Its grub does not kill the 
caterpillar until the latter has pupated. It feeds upon it as an 
internal parasite. 
The ichneumon fly probably lays its eggs in the young 
Hybleza larva. 
Norg.—I found another form of Ichneumon parasite present upon one 
of these caterpillars. This was a minute grub which was feeding externally 
upon the latter instead of internally, as in the case of the two above de- 
scribed ones. ‘he Hyblea caterpillar was full-grown, but its body was 
very flaccid and it died within a few hours of my first observing the small 
predaceous grub which was at that time small, pale, white, translucent and 
sth inch in length. It was first observed on the 26th August. On the 27th 
it was twice the size it had been the day previously with black specks on its 
upper surface. It was very active, wriggling about a good deal. It had 
eaten about 3 of the caterpillar, working from the middle. 
The following day the grub was about } inch in length, torpedo-shaped, 
with a pointed yellow head and greyish dorsal surface. Under the 
microscope it was seen to be a pale yellow green with small white bodies 
apparent under the skin which appeared to consist of fatty substances 
It was active and was still feeding upon the caterpillar. It appeared to be 
nearly full-grown. This interesting larva pupated and then died, and so I 
was unable to make any further observations upon it. There is no doubt 
that it commences to feed upon the Hyblzea caterpillar whilst the latter is 
still alive. 
