154 



cayenne peper, tobacco and cigars, and even poisonous 

 substances such as aconite and belladonna. Boots and 

 shoes, in the manufacture of which cardboard or cloth lias 

 been used, are often seriously injured if kept in stjck for 

 any length of time, foi- not only is the cardboard tunnel- 

 led through repeatedly, but even the leather does not 

 escape the attacks of the voracious larvae. 



The methods of prevention and control are the same 

 for this as for the preceding insect. 



Fig 161. Drug store beetle. 



(a) larva ; (b) pupa ; (c) adult ; (d) adult, side view, fularaed. 



(From U.S. Dept. Agric.) 



THE MEAL WORMS AND MOTHS AND THE GRAIN WEEVILS. 



Flour, bran and meal, as well as seed for planting, such 

 as Indian corn, Guinea corn, peas and beans, are attacked 

 by a number of minute insects, which in spite of their 

 small size are capable of causing a considerable amount of 

 injury. 



There are two species of weevils (Calandra granaria aud 

 C. ori/za), which are almost cosmopolitan in their habitat, 

 and which are very general feeders, attacking stored grain 

 of all kinds. The grain weevils (see Pig. 162) are small 

 snout beetles, dark-brown, or black in colour, about f^-inch 

 in length. The larvae are legless grubs, very short and 

 thick, with a much wrinkled skin. 



The saw-toothed grain beetle (Silvanus surinamen- 

 sis, L.) is one of the commonest of the grain insects. The 

 adult is about -y-inch in length, and brown in colour. The 

 common name is derived from the presence of toothdike 



