PINE BEETLE. 131 
never to be found there, nor have we any notes of the beetles wintering 
in its crannies. But probably where the soil beneath the trees could 
be treated, we might do much there towards getting rid of the 
infestation. Skimming the surface and destroying it would do good 
if we could be sure we went down low enough to remove the grubs; 
but these being so very small, it would be difficult to detect their 
presence in the earth. But where the ground was bare, it would be 
well worth while to try the effect of as heavy a dressing as the owner 
thought safe of some chemical manure, as kainite, nitrate of soda, or 
any other application which (similarly) we know to be good for plant 
growth, and injurious to at least some kinds of insect life. 
Po Nuk 
Pine Beetle. Hylurgus piniperda, Linn. 
Hytureus PrInriperpA.—l, beetle; 2, larva; 3, pupa: all magnified, with line 
showing natural length of beetle. Pine shoot tunnelled by beetles. 
Early in January of the past year (1896) a few letters appeared in 
the columns of ‘ The Scotsman’ which are of great practical value as 
evidence from local Scottish observers of the great extent to which 
K 2 
