PHLYCT^ENIA FERRUGALIS. 215 



sometimes attacked during midsummer by the 

 larva of a small moth. The insect has been 

 identified for us by the Entomologist of the 

 United States Department of Agriculture under 

 the above name. The larvae attack the leaves, 

 destroying the softer parts and leaving only 

 the skeleton or framework of the tissues. The 

 illustration does not show this plainly, as the 

 camera does not distinguish the colors sufficiently. 

 Plants grown in shady places are usually most 

 liable to attack. Generally the worms are sur- 

 rounded by a light web, and occasionally two leaves 

 are fastened together in order to give them pro- 

 tection. The insect never produces serious injury, 

 but is is well to watch for it and take such steps 

 to destroy it as may be practicable. It may be 

 destroyed by picking the leaves containing the 

 larvae, but by far the best method is fumigation 

 with cyanide gas. Where this gas is used for 

 other pests the insect in question is easily kept in 

 check. 



