106 



THE GYPSY MOTH. 



in Watertown. This cemetery is often thronged with visitors 

 from far and near. It was well cleared of the moths in 1892 

 and 1893, but in 1895 the caterpillars appeared again in 

 such quantities near the graves of the poets Lowell and 

 Longfellow that much effort was required on the part of the 

 workmen employed by the Board to prevent serious injury 

 to the trees in the cemetery. Though Charlestown was 

 cleared of the moths in the first three years of the work, 

 they were found in 1895 at Monument Square. These 

 grounds about Bunker Hill monument are much frequented. 

 Many people coming from other parts of the infested region 

 have visited the monument within a year. The carnival in 

 Charlestown on the 17th of June, a time when the cater- 

 pillars are most numerous, draws thousands of people from 

 the region round about to the vicinity of the monument. 



A Study of the Methods and Eoutes or Trans- 



PORTATIOJ^. 



In 1891 hasty inspection of the infested region finally 

 revealed its apparent extent. This inspection was carried 

 on until, in 1893, a wide belt around the region had 

 been examined. The question whether the moths had been 

 transported to any distance beyond this belt in sufficient 

 numbers to continue the existence of the species and thus 

 form other centres of distribution remained unsolved. It 

 was not possible under the appropriations made to extend 

 the search over the entire Commonwealth. As it was evi- 

 dent that the moth was distributed principally by man, a 

 study was made first of the nature and direction of the 

 traffic and travel which had caused the dissemination of the 

 moth through the region known to be infested ; next a study 

 was made of such similar traffic as extended to a distance 

 from the infested region and which, therefore, might expose 

 other localities to infestation. 



In studying methods of transportation special attention was 

 paid to the steady and constant traffic back and forth between 

 points within and without the heart of the infested district. 

 Information was also secured as to the character, routes and 

 destination of outward freight shipments by road and rail, 

 and of the vast miscellaneous traffic and pleasure driving- 



