No. 4.] 



THE GYPSY MOTH. 



307 



Summary. 



Following is a summary of such results of the work as can, from 

 their nature, he accurately recorded. Much spraying, cutting and 

 burning of brush, of which no accurate figures could be made, 

 was done from time to time, and there was much incidental labor 

 required in inspecting and cleaning, the results of which cannot 

 be tabulated. The figures given are for work done from April 1, 

 1891, to Jan. 1, 1892. 



Trees. 



Number inspected, 

 Number infested, . 

 Number cleaned of eggs, 

 Number sprayed, . 

 Number cemented, 

 Number burlapped, 

 Number banded, . 



Buildings. 



Number inspected, 

 Number infested, . 

 Number cleaned of eggs, 



Fences. 



Number inspected, 

 Number infested, . 

 Number cleaned of eggs, 



3,591,982 



213,828 



212,432 



177,415 



19,290 



08,720 



12,000 



87,530 

 3,047 



3,574 



53,219 

 0,808 

 0,570 



A conservative estimate, based on the daily reports, has shown 

 the number of egg-clusters destroyed during the first six weeks of 

 the season to be 757, 7G0 ; the average number of eggs in each 

 cluster is 468; thus 353,031,080 eggs were destroyed during that 

 time and other millions would have been gathered had they not 

 hatched. 



The number of egg-clusters gathered during October, November 

 and December, 21,623, represents, probably, about one-third of 

 those deposited upon the trees this fall. It will be seen by these 

 figures that the vast increase of the moth has been checked, and 

 only about one-tenth as many egg-clusters were found this fall as 

 were gathered in the spring. 



The Destructiveness of the Moth. 



Owing to the reduction of their numbers by the measures taken 

 during the past season, the only favorable opportunities of observ- 

 ing the voracity of the gypsy moth caterpillars were in two locali- 



