182 



JOURNAL OF ECONOMIC ENTOMOLOGY 



rV^ol. 10 



100 yards. These lines are run to the colony limits, which in some 

 cases is nearly two miles. At the laboratory these eggs are sifted and 



PEA BODY, MAS6, ANA^TATUS COLONY . 1916 



Fig. 7. The figures give the percentage of parasitism of the gipsy moth eggs at 

 these points by Anastatus bifasciatus. In a few places it was impossible to make 

 collections, such places are indicated by the absence of figures. The concentric circles 

 represent distances of 100 yards, excepting the six inner ones which represent distances 

 of 100 feet. The N. W. and S. E. Mnes run into other Anastatiis colonies, which ex- 

 plains the high percentage of parasitism at the ends of these hnes. This chart was 

 prepared by Mr. R. Wooldridge and the photograph of it was made by Mr. H. A. 

 Preston. 



the amount of parasitism determined. As this work is done during 

 the winter, the Anastatus larvse are seen within the gipsy moth eggs 

 and the parasitism by Schedius is determined by making a count of the 



