DISTRIBUTION. 



Dorchester, formerly a town adjoining Boston, is now a part of 

 that city and is mainly a residential district, well provided with shade 

 and fruit trees. Quite a portion of the Public Park system is in this 

 region, Franklin Park, Franklin Field and Columbia Road being 

 portions included. 



Map of infested region as located Nov. 1906 is shown by the heavy line. The 

 probable original center is marked by a spot. 



An examination of the infested region made in November, 1906, 

 as determined by the presence of cocoons on the trees, showed that 

 these were most abundant in a neglected Pear orchard on Columbia 

 Road, close beside where there was once a Japanese nursery. This 

 nursery was removed several years ago, and the lot has since been 

 built on, but the great abundance of cocoons of this insect around 

 the place, together with the fact that it is a Japanese insect is very 

 suggestive as to the way in which it may have reached this country. 



Columbia Road is a wide double street with a central strip of lawn 

 and young trees, a row of which is also on each side, and the cocoons 



