66 ENTOMOLOGICAL SOCIETY 



notice. Chionaspis euonymi, which has been extremely in 

 jurious to the Euonymus japonicus in this city, and which 

 attacked certain fine plants in my own garden, is a difficult 

 species to deal with by virtue of the fact that it is so irregular in 

 breeding. Last year I became aware of its occurrence on my 

 own plants too late to deal with it effectually. Experiments 

 made during the autumn and winter of iS92-'3 with the ordinary 

 kerosene emulsion 4 or 5 times diluted only destroyed but a 

 small portion of the mature females, but a much larger propor 

 tion of the immature scales. A curious thing about this partic 

 ular species is that there is continuous hatching throughout the 

 summer at no regular intervals, and that even as late as frost 

 larvae will be still hatching. Moreover, the females hibernate in 

 various stages of development. No eggs will be found under the 

 females during winter, and one might almost be led to suppose 

 that it is viviparous. From about the middle of May, however, 

 the eggs begin to be produced, a few only from each female, and 

 these continue to hatch over quite a period. 



An experience which I had last summer is interesting as indi 

 cating the migratory power of the young larvae. I had planted 

 in the spring a vigorous specimen of Ruonymus scandcns against 

 the stone wall of my front porch. This is about ten feet from 

 the nearest standard Euonymus which was infested, and there is 

 a flower bed nearly three feet wide, besides three strips of grass 

 sod, and a gravel walk four feet wide between the two. I know 

 that the young Euonymus scandens was perfectly free from 

 insects, and yet by midsummer I noticed that the insects swarmed 

 upon it so much so that it was practically killed down this past 

 winter. The young larvae must have persistently crawled this 

 distance, a large number of them reaching the climbing Euony 

 mus whether instinctively wending their way in that direction 

 or whether others were scattered in all directions and lost I did 

 not ascertain. It is very doubtful if they could have been carried 

 over in such numbers by other insects, especially as ants are 

 seldom seen on the Euonymus, and that the wind played no part 

 in the distribution may be justly inferred from the fact that the 

 climbing plant was in a northwesterly direction from the other, 

 a direction in which the winds are rare in summer, as they are 

 far more often from the west or southwest or else from the north. 



The Maple Scale, Aspidiotus tenebricosus, was exceedingly 

 abundant two years ago and, as many of the members are aware, 

 the Park Commissioners severely pruned and cut down many of 

 the trees along some of our principal streets and whitewashed the 

 trunks, with a view 7 of checking or destroying it. This treat 

 ment, as I know from examinations made both by others as well 

 as myself, did not kill the insects, as they continued to breed last 

 year on all the new growth. Observations on this species also 



