A STUDY OF COMPSILURA CONCINNATA. 25 
this parasite has been firmly established for some time, but spraying, 
hand-suppression work, and the effects of predacious enemies, disease, 
and other parasites have all had their parts to play in causing the 
decrease, not only of the gipsy moth and the brown-tail moth, but of 
other native pests as well. 
From the foregoing it will be seen that Compsilura concinnata is 
the most important tachinid parasite brought into this country for 
combatting the gipsy moth and the brown-tail moth, and that it 
attacks both freely. Judging from its increasing list of native hosts 
in the United States, it bids fair to become one of the most important 
“conomic parasites in this country. Compsilura has been established 
in the United States only 10 years, and during that time it has 
been recorded from a large number cof native hosts, and no doubt 
this host list is much longer than is known at the present time. 
