THE. FIRE WORM OF THE CRANBERRY. 15 
taining a receiver attachment, as explained in the annexed figure, @ 
being the receiver in which the hellebore is placed from above, ) the 
tin nozzle into which it drops through the 
narrow aperture at the bottom, and ¢ the 
mouth of bellows. When examined in June 
the protected space was completely stripped 
of leaves, while the portion treated to hel- 
lebore, though badly damaged, showed the 
een benefit of the treatment. To ascertain the 
Fig. 1.—Powder bellows. effect of hellebore on the larve I placed sev- 
eral in a box of which the bottom had been dusted with hellebore. At first 
they paid no more attention to it than to so much dust; in ten minutes, 
after a continuous travel through the stuff, they began picking up parti- 
cles with their mandibles; in twenty minutes they were very uneasy, and 
gradually became paralyzed, but were alive for more than an hour after- 
ward. Ultimately the larve all died. The experiment was carried on 
ih the openair. As to its effeet when applied on the bog: It was applied 
twice on a portion of the bog where the larvew were unusually abundant, 
and each time it seemed to reduce the number of larva, and undoubtedly 
did prevent their eating as much as they otherwise would have done, 
yet in the very spots where it had been thus freely used the moths 
appeared a few days later (June 11) by thousands. This was the result . 
wherever it was used; it undoubtedly did much good, but I believe less 
by killing the larve than by forcing them to leave their poisoned quar- 
ters to seek food on the lower parts of the vine where they could do 
less harm. A drawback in applying this and other insecticides is that 
it is necessary to force it into the habitations of the insect, which is a difti- 
cult matter; moreover itis much more difficult to reach the second brood 
than the first, because the first spins up at the start only a leaf or two 
at the extreme tip, and must soon come out for food; the second brood, 
on the contrary, when it does begin to spin gathers up two or three 
sprays—enough for three insects—and so need not at any time come 
within reach of the poison, no matter how liberally applied outside 
its habitation. Iam satisfied that not only contact with but the act- 
ual eating of white hellebore is requisite to destroy the insect. I con- 
sider hellebore valuable, but not the most valuable insecticide. 
Bisulphide of Carbon.—Mr. Haveus, of Prospertown, used a prepara- 
tion said to be of this poison and handed me some to experiment with, 
but without giving me any further information as to the pature of the 
preparation, which was in the form of a brownish powder; it was tried 
on several larvie,as in the case of the hellebore, and proved rather more 
active, but having the same general effect. I believe it to be open to 
the same objection there is to hellebore.* 
* This could not have been the bisulphide of carbon.—C. V. R. 
