Pxors) 
the eggs. The parasite was watched for the next half hour, during 
which time it oviposited in fifteen eggs. Does the parasite ride around 
on the butterfly, waiting for oviposition / 
ON THE OVIPOSITION OF CACGHCIA CERASIVORANA. 
By CuarENcE M. WEED, Durham, N. H. 
[ Abstract. | 
The eges are laid in flattened masses on the bark of chokecherry 
shrubs very near the ground. The egg mass at first is yellow, but 
later it becomes brownish, so that it is very difficult to distinguish it 
from the bark. There is but one brood of larve a year, the eggs laid 
in summer remaining unhatched until the following spring, then the 
young larvee crawl to the top of the shrub, where they begin the con- 
struction of the tent. 
The next paper was entitled: 
THE RELATIONS OF PIMPLA CONQUISITOR TO CLISIOCAMPA 
AMERICANA. 
By Cuarence M. Weep and Wituiam F., FIske. 
[ Abstract. ] 
Pimpla conquisitor is the most important hymenopterous parasite 
attacking the pupa of Cliscocampa americana. ‘The eggs are com- 
monly laid in the cocoon of the host soon after its construction, and 
several experiments conducted with a view of ascertaining the inva- 
riability of this rule go to show that exceptions are at least. rare. 
The development of the parasite from the egg takes but little more 
time than that required for the completion of the metamorphosis of 
Clisiocampa after constructing its cocoon, so that their respective 
dates of emergence are not far apart. The pupa shell of the host is 
completely filled by the larva of its parasite when the latter is full 
grown, but after the discharge of the semisolid meconium it is 
scarcely half as large as before. 
The larvee of Pimpla are attacked when nearly or quite full grown 
by a secondary parasite, 7’heronia fulvescens, the larve of which feed 
externally upon their host and finally replace it. The various stages 
of this species from the first have been observed and many speci- 
mens reared. It is about two weeks in reaching maturity from the 
ego. A peculiar fact noticed in the observations upon this species 
is that in the first stage from the egg the minute larva has a hard chi- 
tinous head with large jaws, a feature totally lost in the succeeding 
molts. ! 
6878—No. 26 3 
