1001.] PUBLIC DOCUMENT — No. 33. 87 



probable that little will be seen of it in 1901, or, if abundant, 

 that it will ai)pear in the northern portions of the State, 

 which escaped this year. 



Marguerite Fly. 

 This little pest was sent to the station in rcl)ruary, 1900, 

 with the statement that it was destroying the nitirguerites in 

 the greenhouses of the sender. Careful studies upon its life 

 history and methods for its destruction were at once com- 

 menced, and are now nearly completed. A successful, easy 

 and inexpensive treatment for it has been discovered, and it 

 is hoped that the results of the work will soon be in readi- 

 ness for publication. 



Greenhouse Aleurodes. 



This insect has also caused much destruction in green- 

 houses in the State during the past year, a loss of four thou- 

 sand dollars having been reported in one case, the damage 

 being to early tomatoes and cucumbers, which were com- 

 pletely destroyed. Thorough investigations of the structure 

 and life history of this insect are now being carried on at 

 the insectary, together with a search for methods which will 

 ensure its control. 



Fall Canker Wor7n. 



Little has been published upon the life history of the fall 

 canker worm. During the year this insect has been raised 

 from the egg, and its various stages fully described, much 

 being added to our previous knowledge of the subject. 



Pea-vine Louse. 

 Less has been heard about this insect than in 1899, though 

 it has caused considerable loss in several places in the State. 

 Whether it will increase in importance during 1901 is at 

 least doubtful. 



FaUNAL DiSTRraUTION. 



The distribution of insects is one of great interest and im- 

 portance. Many of our worst pests Avill in all probability 

 never extend as far north as Massachusetts, where the climatic 



