40 



Cluster 3. 



Unfertilized eggs, . 

 Eggs with dead embryos, 

 Eggs apparently alive, . 



Total, 



Unfertilized eggs, . 

 Eggs with dead embryos. 

 Eggs apparently ahve. 



41 



= 10.59 per cent., or about 10.5 per cent. 

 363 =89.41 per cent., or about 89.5 per cent. 



406 eggs. 



Cluster i. 



14 



Total, 



UnfertiUzed eggs, . 

 Eggs with dead embryos. 

 Eggs apparently ahve. 



Total, 



= 5.28 per cent., or about 5 per cent. 

 269 =94.72 per cent., or about 95 per cent. 



284 eggs. 



Cluster B. 



4l 



> = 6.64 per cent., or about 6.5 per cent. 



181 =93.36 per cent., or about 93.5 per cent. 

 194 eggs. 



The average of these 5 clusters gives the following result : — 



31 = 9.20 per cent., or about 9 per cent. 

 306 =90.80 per cent., or about 91 per cent. 



337 



Dead eggs. 



Eggs apparently alive, . 



Total, 



After the wilt had operated in this locality the size of the egg clusters 

 was not up to the average size of the normal cluster, and the percentage 

 of dead eggs was very high. 



Kingston, Mass. 



Division Agent, John A. Eablby; Local Superintendent, C. C. Fauncb. 



With the help of the field inspector, Mr. Norman Souther of Bridge- 

 water, two places were selected for the intended experiments. The lo- 

 cality which we will first consider is an isolated part of the so-called 

 "Rocky Nook," and is situated about 1 mile east of the Kingston- 

 Plymouth car line. This place is about a quarter of an acre in size 

 and mainly overgrown with oaks about twenty-five years of age. The 

 gypsy moths were discovered here in the autumn of 1909 by finding egg 

 clusters. The youth of the colony made it seem improbable that there 

 was any disease among the caterpillars of 1909, and, moreover, the 

 egg clusters had a considerable size. Several of the clusters found 

 had been killed with creosote, but there were still left about 60 clusters, 

 according to Mr. Souther's and my estimate. 



