394 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 5 



on the possible effect of the stronger, more accurately known, solution 

 twenty-eight eggs were treated with a 5 percent solution of calcium 

 polysulphicles. This strength is equivalent to a lime-sulphur dilution 

 of about one to eight, more or less, depending upon many factors. 

 Of the twenty-eight eggs treated, eight hatched. The twenty failing 

 to hatch included probably some natural mortality. In all results 



FIVE PER CENT CALCIUM POLYSULPHIDES, DETAIL TABLE 



