1)4 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 15 



of New Jersey. In the State of Pennsylvania this territory includes 

 Wards 45, 23, 35, and 41 of the City of Philadelphia in Philadelphia 

 County: Townships of Bensalem and Bristol in Bucks County. 



The restrictions placed up^on the movement of nursery, ornamental 

 and g^reenhouse stock, including also soil, compost and manure other 

 than fresh manure, are, we believe, fully as strict as the situation war- 

 rants, and it is our intention to make the inspection and certification of 

 these articles sufficiently strict to eliminate as far as is humanly possible 

 every chance of spread of the insect by this means. The area thus 

 quarantined includes that mentioned in the preceding paragraph and in 

 addition in New Jersey; the townships of Florence, Springfield, East- 

 hampton, Medford, and Southampton in Burlington Comm^j : Townships 

 of Gloucester, Voorhees, Clementon,. and Berlin in Camden County: 

 Townships of West Deptford and Deptford in Gloucester County; 

 in Pennsylvania, Wards 33 and 42 of the City of Philadelphia in Phila- 

 delphia County : Townships of Cheltenham, Abington and Moreland 

 in Montgomery County: Townships of Southampton and Middletown 

 in Bucks County. 



Biological Investigations 



Biological investigations have been and are now being carried on in 

 accordance with the general plan outlined a year ago. Many additional 

 facts relating to the life-history and habits of the insect have been 

 learned. Perhaps the outstanding feature of this work is the fact that, 

 contrary to previous beliefs, the larvae of the Japanese beetle may 

 under some conditions become a serious source of injury. This possi- 

 bility is fully discussed in a paper being presented at this meeting by 

 Mr. L. B. Smith, who is responsible for the discovery^ and it is therefore 

 unnecessary to consider this phase at greater lengths in this present 

 paper. 



Further studies of larval habits have also shown that the distribution 

 of this species is not by any means limited to the heavier soil types. 

 Studies of soil types in relation to larval distribution indicate that the 

 insect can and will propagate in practically any soil type represented in 

 New Jersey or Pennsylvania which will support vegetation. 



Data accumulated have also substantiated the previous statements 

 regarding the status of the beetle as a leaf eating pest of considerable 

 importance. Briefly it may be said that the potential seriousness of the 

 insect as a pest in this respect is in direct proportion to the intensity of 

 nimibers of the insect in any given locality. There has nothing as yet 

 developed to give reasonable grounds for belief that the insect has 

 reached the limits of its capabilities as a pest of orchard and shade 

 trees. Furthermore it also appears that the insect may under some 

 conditions become a pest of some importance to vegetable crops. 



