204 PROC. ENT. SOC. WASH., VOL. 23, NO. 9, DEC., 1921 



resume of the introduction of the parasite and records of rear- 

 ings to 1916 inclusive, was published in the Journal of Economic 

 Entomology, February, 1916, by Mr. McConnell, who adds: 

 "We know practically nothing of its life history and I have 

 never succeeded in inducing it to oviposit. Adults have emerged 

 in cages from April to June inclusive, and from September to 

 December inclusive. Most of the specimens reared were males. " 



Mr. McConnell's statement that there was a predominance 

 of males in this species apparently was based on the 19 speci- 

 mens which had been reared at that time. Since then over 1,400 

 specimens have been reared, of which 529 were males and 929 

 were females. This shows the females predominate by nearly 

 2 to 1. 



This species has become one of the common parasites of the 

 Hessian fly throughout Maryland, Pennsylvania, New Jersey, 

 and New York, but apparently is more abundant in New York 

 than in any of the other States mentioned. The rearing records 

 of this species would indicate that the climatic conditions of the 

 more northern latitudes of the Middle Atlantic States are more 

 adaptable for its development. Nearly 1,500 emergence 

 records have been secured from 151 localities and of these only 

 seven emergence records from three localities are from south 

 of the Potomac River. Hundreds of puparia have been reared 

 from various localities in the Shenandoah Valley of Virginia, 

 but so far we have secured but one record of its occurrence in 

 that State. 



In view of subsequent developments, it seems quite obvious 

 that the insect eventually has obtained a secure foothold in at 

 least part of the country as a result of the efforts at introduction. 

 All things considered, it is not remarkable that it has taken many 

 years for the presence ol this parasite to become manifest, and 

 it now appears certain that it has now become adapted and 

 increased in numbers sufficient to rank in value with other 

 important parasites of the Hessian fly. 



The following list comprises all known records of distribution 

 down to date: 



Delaware: 



Dover, Townsend. C. C. Hill. 



Illinois: 



Campaign, S. A. Forbes; Freeport, Grand Ridge, Hollowayville, Minooka, 

 Morris, Princeton, Seneca, Toulon, W. P. Flint. 



Indiana: 



Logansport, W. H. Larrimer. 



Maryland: 



Braddock Heights, Boonsboro, W. R. McConnell; Cecilton, W. H. Ash- 

 mead; Frederick, P. R. Myers; Funkstown, P. R. Myers and W. R. McCon- 

 nell; Hagerstown, W. R. McConnell, P. R. Myers and E. M. Craighead; 

 Middletown, P. R. Myers; Myersville, W. R. McConnell and P. R. Myers; 



