(Meigen) against the gypsy moth, browntail moth, and redheaded pine sawfly 
(328). It was recovered at gypsy moth colonization sites for several years thereafter, 
but it apparently did not become permanently established. It probably occurs now 
in northern Maine as a result of spread from New Brunswick and Quebec, where it 
appears to be one of the most effective parasites introduced against the European 
spruce sawfly. 
454 
