THE PRICKLY PEAR. 
Cactaceew. The Commission, he said, had found some which apparently’ 
confine themselves to one species of cactus, and when introduced eyen 
to closely related species died out. He thought that it might perhaps 
be possible by breeding ‘a large number of insects to obtain a mutant 
which might feed on the pear pest. In order that this might be done 
pears might also have to be hybridized to induce the insects to transfer 
their attention. The reason why the Coccus indicus has such a bane- 
Tul effect upon the monocanthus opens up another field of inquiry. 
0.62.—5 49 
. 
