EGG PARASITES OF THE GIPSY MOTH. 187 
instance, so far as the above-mentioned colony was concerned, the 
results were the same, and there seems to be no doubt that, in this 
particular locality at least, the species has become extinct. 
In the spring one large colony of the Schedius was planted coinci- 
dently with the distribution of the 100 lots of parasitized eggs for 
colonization by the State forester’s agents, and for two months fol- 
lowing weekly collections of eggs were made with the expectation that 
a partial spring generation would follow. None of these collected 
egg masses produced the parasite, and again it failed to come up to 
that which was expected of it. 
In the fall, as has already been mentioned, very large collections of 
eggs made in the vicinity of that which was considered to be the best 
and most promising of the colonies of 1909 failed to produce Schedius, 
and at the same time numerous smaller collections were made in each 
of the other colonies of 1909, as well as in a considerable number of the 
spring colonies of 1910. In only one of the colonies of 1909 was the 
Schedius recovered, and this, curiously enough, from that in which 
every attempt had been made to secure evidence of spring repro- 
duction. Here it was found in one direction from the center of the 
colony only, and over a rather limited area. In the immediate vicin- 
ity of the colony site (within 100 yards) none could be found. 
The collections which were made in each of the other colonies of 
1909 were followed by curiously similar results. The parasite was 
recovered in one of them, and in one only, and although collections of 
eggs were made in all directions from the center and at varying 
distances, parasitized egg masses were only found in a limited area 
to one side and some distance away. 
It was pretty conclusively demonstrated that the larve and 
pupe of Schedius could not survive the rigor of the winter, and it is 
very difficult to say whether the recovery of the parasite in this 
last-mentioned instance is indicative of its ability to survive the 
winter as an adult. In 1909 a quantity of the adults was placed in 
a small cage in the open before the beginning of severe weather, and, 
although mortality was heavy, some of them lived for a long time 
after all of the younger stages were destroyed. None of them lived 
through until spring, but there is nothing to prove that they would 
not have done so had they had their choice of situations in which to 
hibernate. 
It may be that females successfuily hibernated in the instance of 
this colony, which appears to have lived throughout one year in the 
open. It may also be that the recovery of the species under these 
conditions is the result of dispersion of the individuals from some of 
the many spring colonies, several of which were located within a not 
unreasonable distance of this spot. It will require another year to 
demonstrate the truth of the matter. 
