RED SPIDER 



143 



Control. Examine canes as soon as the foliage starts, at which 

 e the injured ones may be easily detected. These should be 

 t out and burned. If the damage is slight, the work of this 



insect may be ignored, yet, if neglected, it may become injurious 



on account of excessive numbers. 



FIG 



162. Hatching of a tree cricket: A, position of embryo in egg; B, C, D, E, suc- 

 cessive stages in emergence of nymph. (Parrott and Fulton, Geneva Bull., 388.) 



Attacking the Leaves. 



The Raspberry Saw-fly. The adult of this insect is a four- 

 winged fly (Monophadnus rubi Harris). It deposits its eggs near 

 the veins of the leaves and beneath the epidermal layer. The 

 body of the larva is nearly white and thickly covered with trans- 

 verse rows of white spines. The head is greenish white, with a 

 black eye-spot on each side. After feeding upon the leaves until 

 late in the spring, the larvae become full grown and enter the 

 ground to form pupal cases. They emerge as adults early the 

 following spring. 



Control. Spray or dust with white hellebore, using one ounce 

 hellebore to one gallon of water. 



The Red Spider. This is not an insect, but a mite (Tetrany- 

 chus bimaculatus Harvey), as shown by the fact that the adult 

 has eight legs, but the immature form has only six legs. It often 



