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BULLETIN 1428, U. S. DEPARTMENT OF AGRICULTURE 
larvse burrowing not only into the woodwork of floors and sides of 
the bins but into the rafters, beneath shingles, and wherever the 
Fig. 9. — Hibernation of the cadelle : A, Sectioned softwood board from granary 
used for wheat storage, showing numerous larvae of cadelle using board for pro- 
tection during winter months ; D, cadelle larvae about to pupate ; C, cadelle larvse 
hibernating in chamber cut in Wilton rug; B, same as C, only several months 
later, after larva has transformed to adult 
timbers or boards were joined. In warehouses with wooden floors 
used for the storing of grain and grain products, such as ordinary 
establishments handling animal feeds, the insects secrete themselves 
