No. 4.] 



THE GYPSY MOTH. 



363 



located as a result of the perusal of the bulletin by one of 

 the owners of the infested estates. The bulletin has been 

 distributed in the following cities and towns : — 



Two factors have been of importance in the development 

 of outside colonies. The spreading of the moth from the 

 woodland colonies in the years of restricted appropriations 

 has been accompanied with grave dangers. More important, 

 however, has been the great dissemination of the insect in 

 the early years, when its activities were practically uncon- 

 trolled. 



Since so few infestations, comparatively, have developed, 

 it is probable that now, in the eleventh year since the moth 

 outbreak (and consequently greatest spread) of 1889, suffi- 

 cient time has elapsed for the development and discovery 

 of any colonies started six to ten years ago. From the 

 be^innius: of the work the efforts of the Board have been 

 directed to keeping the main avenues of travel and public 

 places in infested towns free from the moth, thus guarding 

 against this very danger of distribution. For years past 

 the moth has been reduced to a minimum in the very places 

 where the chance of distribution was the greatest. But 

 even if outside colonies should develop in the future, their 

 occurrence, unless they are larger, more numerous or farther 



