OUR FRIENDS AND FOES 



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sired location. As the larva grows it finds it necessary 

 to enlarge its case both in length and circumference. 

 The wav it does this is rather interesting. Without 



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bursting its case the larva makes a slit half-way down 

 one side, and inserts a triangular gore of new material. 



FIG. 120. Larvre of clothes moth feeding on felt. Photographed from life. 



A similar insertion is made on the opposite side. 

 The larva revolves itself without leaving the case, 

 and makes corresponding slits and additions in the 

 other half. It lengthens its case by adding to either 

 end. In appearances the case looks like a matted mass 

 of wool. If the interior be examined it will be found 

 to be lined with soft white silk. If the larva is trans- 

 ferred from time to time to fabrics of different colors, 

 the cases .may be made to assume as varied a pattern 

 as one desires. The varied colors will illustrate the 

 peculiar methods of enlarging just described. The fully 

 developed larva about to pupate attaches itself by silken 

 threads to the garment upon which it has been feeding. 



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