124 PLUM. LEAVES — PLUM LEAF-LOUSE. 



e. First fork at tip much farther from the tip of the second fork than from 



the third vein, the cell as broad towards its base as at its apex. 



f. The same cell very narrow, not half the width of those each side of it. 



g. Only a single fork in the left wing. 

 ft. Only a single fork in the right wing. 



The remedies already stated for the apple aphis, will be equal- 

 ly efficacious for this and other species of this family. 



