Ix PESTS 175 
a semicircular form, that the work of this insect is 
readily distinguished from the depredations of cater- 
pillars. It is not very common or occurring in large 
numbers, and usually attacks Roses of free and 
strong growth. Still, it has the habit of continually 
coming back to the same plant for its supply of up- 
holstery, and may be found a pest in certain places. 
The bee may be easily caught in a butterfly net, or 
when laden can be traced to its nest, which can then 
be destroyed. 
“Scale” insects (Aspidiotus) may often be found 
on the shoots of neglected wall-Roses. Finger and 
thumb or a solution of soft soap will soon remove 
them. Red spider (Tetranychus) is not likely to be 
found on Roses anywhere but under glass, and the 
remedy for this is a moister atmosphere. There are 
other insects which occasionally do damage to 
Roses, especially chance visitations of caterpillars 
which naturally prey upon other plants, but these 
cannot fairly be included among the pests of the 
Rose. 
Protective Insects.—There are a few flies and grubs 
which actually do good by preying upon well-known 
pests, and thus acting as allies and friends of the 
Rose grower. It is important that these should be 
known, for it is well that we should be able to 
recognise and spare our assistants, though the 
enemy is in such overwhelming majority that the 
advice to suspect and destroy all insect life is 
common and even safest in cases where the friendly 
forms are unknown. 
Ichneumon flies form one of the strange pro- 
visions of Nature for keeping in check the undue 
increase of insects. These flies lay their eggs in the 
