Specific Pests 155 
poplar, and willow —- damaging and even killing the younger 
trees and young branches. 
Pruning the infested branches seems the only remedy. 
Clicking Beetles, similar in shape, but smaller than the 
former and of dull colors, are most readily recognized 
by their capacity of snapping and jumping when laid 
on their backs, thereby regaining their legs. Their grubs 
are the long, slender wzre-worms, living for three years 
underground; they are especially injurious to grass crops and 
lawns, cutting off the grass just below the crown, the grass 
browning and dying in constantly enlarging patches. They 
also injure trees by feeding on their roots, while the beetles 
gnaw the young roots of deciduous trees and conifers. 
Ditching around the affected patches of lawn and collect- 
ing the worms as they come out into the ditch, or poisoning 
them with Paris Green is applicable to the grass pests; hot 
water applications at the root, collecting the beetles or 
baiting them with poisoned wads of clover, potato, or corn- 
meal at night are methods applicable to the tree pests. 
Cockchafers are large beetles, of which the well-known 
June bug is a type; they cause injury to leaves in the beetle 
stage and to roots in the grub stage; the latter, living for 
several years underground, are capable of ruining young 
plantations. 
They are easily collected as beetles, by jarring the branches 
late in the evening, or better, in the cool of early morning, 
when they do not fly readily. When underground, the 
application of kerosene emulsion ten times diluted, or of a 
tobacco decoction, or else digging them out may be resorted 
to. 
Leaf Beetles are small or medium-sized, often of bright and 
metallic color, of semi-spherical or cylindrical form and 
compact body. Both beetles and larve, which latter are 
