132 
PARASITES OF GIPSY AND BROWN-TAIL MOTHS. 
THE BROWN-TAIL MOTH AND ITS PARASITES IN EUROPE. 
Reference has already been made to the fact that in those sections 
of Massachusetts in which both the gipsy moth and the brown-tail 
moth occur, the latter is considered as the lesser pest of the two. 
This opinion, as held by those who are thoroughly familiar with the 
comparative noxiousness of the two, speaks quite plainly of the char- 
acter of the gipsy moth as a pest, in view of the very considerable agi- 
tation which has come about on account of the brown-tail moth in 
Table II. — Sequence of gipsy-moth parasites in Europe. 
fXR/IS/TES. 
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S/XTH 
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SEV- 
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localities into which it has preceded the gipsy moth or where the latter 
has not as yet reached a state of destructive abundance. 
On account of the lesser interest aroused in the brown-tail moth in 
Massachusetts, its parasites have not been given quite the considera- 
i ion, in some respects, that has been given to those of the gipsy moth, 
but this lack of consideral ion has bad entirely to do with the question 
of the future policy of the laboratory, and has not extended to the 
actual handling of Hie parasites themselves. In every respect other 
than as a basis lor calculations as to future policies of the labora- 
