THE CHALCIDOID GENUS PEEILAMPUS. 



69 



It is not probable, but it is conceivable, that the establishment 

 of P. cwprinus in America might make all the difference between 

 success and failure of the whole work of parasite introduction, in 

 so far as the gipsy moth is concerned, because, in the first place, 

 BlepJiaripa scutellata is one of the most important parasites of the 

 gipsy moth and the success or failure attending the attempts to 

 introduce it into America might easily tip the scale one way. or the 

 other, and Perilampus, so far as known, is the most important para- 

 site of Blepharipa and might in a similar manner determine whether 

 or not its host reached the necessary state of efficiency. 



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