43 



complete and final conclusions in regard to the work of the wilt in 

 this locality, nevertheless the result of the examination of the single 

 cluster which could be secured may be given : 



Unfertilized eggs, . . 1 1 



Eggs with dead embryos, . 12 /= 3 ' 52 P er cent " or about 3 ' 5 P er cent ' 



Eggs apparently alive, . . 356 =96.48 per cent., or about 96.5 per cent. 



Total, . . . .369 eggs. 



All we can say concerning this locality is that through the operation 

 of Flacherie, which was introduced by sick material only, the number 

 of fresh clusters seems to have been reduced in comparison with that of 

 the previous year. 



Brockton, Mass. 



Division Agent, L. W. HODGKINS; Local Superintendent, E. MOLTAN. 



The place which, with the assistance of the inspector, Mr. Norman 

 Souther of Bridgewater, was selected for an experiment, is situated 

 near Oak Street, northwest of Brockton Center and east of the Dutch- 

 land Farm. The place, of about half an acre, consists of a growth 

 of oaks about forty to fifty years of age; no brush is present. The 

 caterpillars of the gypsy moth were abundant here in the summer of 

 1909, but no disease was noticed among them. Several of the clusters 

 were killed with creosote during the winter of 1909-10. The clusters 

 which were left were estimated by Mr. Souther and myself to be 

 about 40. 



The raising of caterpillars for the intended experiment Mr. Souther 

 intrusted to Mr. Rudolph Marshall, 218 Battle Street, Brockton. On 

 June 24, 1910, the brood was inspected. Several caterpillars had 

 already died from the wilt and the others were found to be sick. This 

 same day the whole material was exposed in the selected place. The 

 bag was fastened between oak limbs, about 8 feet from the ground. 

 Most of the caterpillars of this locality were at this time about half 

 way between the third and fourth molt. 



This place was visited again on Oct. 7, 1910, with Mr. Souther, to 

 determine the number of fresh clusters. But in spite of the most strenu- 

 ous search there were found but 4 clusters; these were collected for 

 examination. They resulted as follows : 



Cluster 1. 



Unfertilized eggs, . . . 2 ) 



Eggs with dead embryos, . 10 / = 2 ' 99 P er cent '> or about 3 P er cent ' 

 Eggs apparently alive, . . 389 =97.01 per cent., or about 97 per cent. 



Total, 401 eggs. 



