362 PESTS OF THE HOUSEHOLD AND STORED PRODUCTS 



Fig. 573. — Adult of the Indian-meal Moth. Enlarged and natural size. 



Original. 



of the insects will be killed. Some additional piping may be necessary 

 in order to accomplish this, but usually the cost is justified by the 

 results, and the improvement, once made, is permanent. 



The pest may be killed by 

 fumigation with carbon bi- 

 sulphide or hydrocyanic acid 

 gas. 



The Meal Snout-moth {Pyralis 

 farinalis Linn.) 



The habits of this species 

 resemble those of the Indian- 

 meal moth. The larvae work in 

 grains or grain products, such 

 as flour, bran, or meal, and spin 

 long tubes of silk, ruining more than they consume. There are three 

 or four generations annually under favorable conditions. 

 Treatment is the same as for the preceding species. 



Fig. 574. — Larvte and pupa of the Meal 

 Snout-moth. Slightly enlarged. Orig- 

 inal. 



