Insects and Fungi Attacking Trees, Etc. 337 



The eggs are laid under the epidermis or outer covering of 

 the leaf, and the larvae appear in about two weeks, feeding 

 upon the soft green parts of the leaf and leaving nothing 

 but the midrib, veins, and epidermis on one surface. It is of 

 a greenish color, nearly transparent, the head much larger 

 than the posterior part of the body. It feeds rapidly and 

 must be attended to soon after the eggs hatch. 



Remedy. Dusting or spraying with hellebore or pyre- 

 thrum powder is a certain remedy. If the dry powder is 

 used, it must be applied when the foliage is wet with rain 



FIG. 186. Rose-slug. 



(Riley: "Insect Life," Vol. V., p. 274. Fig. 37-) 



or dew. When used in water, i tablespoonful to a common 

 2-gallon pail of water is about the right quantity. It 

 is most effective if applied just before dark in the after- 

 noon. Also use arsenate of lead or Paris green. 



Rose-leaf Hopper (Typhlocyba rosed}. This insect is 

 small, almost white in color, and flies or jumps about when- 

 ever the trees or bushes are suddenly jarred. It feeds upon 

 the green coloring-matter of the leaf, sucking out the juices, 

 making very numerous small white spots until the leaf 

 becomes very light green or almost white. This is the most 

 serious rose insect and causes the dead brown leaves seen 

 everywhere in the late summer. It is especially injurious 



