Hygiene for young people . Fiqcre 49.—Grub of American Silkworm Moth,often found upon our oak trees. the inside of a cocoon,are all shown inthe accompanyingfigures. If you have notseen the big green seen the largeAmerican grubthe cocoon, stage,the pupa, taken fromand the male moth. i n , i * . Figure 50.— Cocoon of the American silkworm. grub of the Ameri-can silkmoth, you must surely have seen the grub of the potatobeetle. These eatthe leaves of thepotato, just as silk-worms eat theleaves of the mul-

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectc, booksubjecthygiene