20 4 



DESTRUCTIVE INSECTS. 



leaves ; all such canes should be cut off near the ground and 

 burned. 



The Snoiuy Tree-Cricket ((Ecanthus niveus) sometimes seri- 

 ously injures raspberry canes by depositing its eggs in longi- 

 tudinal rows in the canes, forming a long ragged scar, as 



FIG. 271. FIG. 272 



FIG. 271. Currant Span Worm. FlG. 272. The Snowy Tree-cricket, a, d, 

 Stems of raspberry with eggs ; c, d, egg, enlarged with details. 



shown is Fig. 272. These eggs are laid in late summer or fall 

 and do not hatch until the early part of the next summer. 

 Except for the injury caused by the female in laying her eggs, 

 this tree-cricket is not an injurious insect, but is said to feed 

 upon plant-lice and other insects. 



Canes containing these ragged slits full of eggs should be 

 cut off and burned, especially in the fall and winter. 



The Raspberry Saw- fly {Monophadnoides ruin) attacks the 

 foliage of raspberries, blackberries, and dewberries, and often 

 occurs in sufficient numbers nearly to ruin the crop. The 



