56 a EXPERIMENT STATION. [Jan. 



The box leaf miner (Monarthropalpus huxi Lab.), a recent 

 arrival in this country, has caused much injury to box trees 

 and hedges. Its life history and habits are little understood, 

 and a study of this subject and of control methods has been 

 begun. 



Tests of various insecticides have been made from time to 

 time, though in most cases sufficient opportunity was not 

 available for anything like sufficient experiments to permit final 

 conclusions. Of the materials tested, the dry arsenate of lead 

 manufactured by the Corona Chemical Company proved very 

 satisfactory, as did also Bowker's lime sulfur prepared by the 

 Bowker Chemical Company, and lead arsenate paste furnished 

 by the Powers, Weightman, Rosengarten Company. Kylscale 

 and soluble sulfur did not give as satisfactory results in con- 

 trolling the San Jose scale as had been hoped, though many of 

 the insects were undoubtedly destroyed. 



Under the Adams fund, work has been continued on the 

 projects already authorized. In the study of the importance of 

 wasps as parasites it had already been found that any deter- 

 mination of this for the different kinds must necessitate a recog- 

 nition of the different species, of their distribution and relative 

 abundance. To clear up these points, a study of the material 

 from this country in Europe was necessary, and fortunately 

 this became possible last year. The way is now clear to con- 

 tinue this work on a sound basis as a result of these studies, 

 and it is being prosecuted as rapidly as possible. 



The tests of various insecticides, referred to in previous re- 

 ports_, have been continued, and about 4,000 are now recorded. 

 The results thus far have been as satisfactory as could be ex- 

 pected, and the project will be continued. 



The work of the apiarist of the station is stated as follows : — 



As reported in person to Dr. Evans, Sept. 29, 1913, the Adams fund 

 project of the apiarist of the station has progressed along its orig- 

 inally intended lines. Effort was made to ascertain the number of visits 

 per unit of time which are made by a bee to flowers, as, for instance, 

 to the clover. The visits are a complex of reactions, which thus far 

 are interpreted with consideration of weather, abundance of nectar in 

 the flowers, the frequency of visits of other bees to the same flower, 



