INSECTS INJURIOUS IN 1902. 41 
injuring the green grass with which the gas came in contact. In 
round numbers this is one part of the liquid to 1900 parts atmos- 
phere. 
An effort was made to use a large cloth covered frame four 
inches deep by four feet ten and % inches by thirteen feet ten 
inches previously employed in experimenting with Chinch Bugs, 
in order to cover a larger area of lawn. Under this 3 oz. 6 oz. 
and 8 oz. of bisulphide of carbon were used at different times, 
with exposures of three hours each time, this resulted in only a 
partial success as regards killing the grubs. Lack of success 
was undoubtedly due to the fact that the frame was not tight, the 
gas must not only have escaped through the cloth but the corners 
of the frame were badly jointed and we experienced difficulty 
in properly banking the edges next the sod with earth. I have 
no doubt, however, but that a frame entirely of wood with tight 
joints could be made of the same dimensions which would be as 
effective as the small box, under which the gas worked so success- 
fully. In the case of the small box the criticism is made that it 
covers only a small area at a time. ‘This is quite true, but if the 
injury is met with treatment as fast as it appears a small box is 
better than a larger one; furthermore, this treatment is not possible 
until the presence of the grub is made evident by the dying grass. 
Bisulphide sells for from 12 cts. to 15 cts. per Ib. in 5 lb. lots in 
Minneapolis. Only one grade quoted here. Taylor’s “Fuma” 
Carbon Bisulphide has been quoted in Cleveland, Ohio, at Io cts. 
per Ib. in 50 Ib. cans. 
Robins are very fond of this grub and can frequently be seen 
listening intently for any sound from beneath the sod which will 
betray the presence of the delicate morsel. Once heard it takes 
but little effort on the part of the bird to pull the grub from its 
retreat. 
WOOLLY APHIDS. 
ON APPLE: Schizoneura lanigera, Hausmann. 
Was found this season in a few instances on young stock. 
This, the Woolly Louse of the apple, is one of the worst pests the 
orchardist and nurserymen have to deal with. It is found not 
only upon branches but also upon the roots where it forms gall- 
