FIG. 185. Life histories of Insects. 



L P * and A., larva, pupa, and adult respectively of water-beetle Wytiscus 

 marzinalis)\ /., /, ., larva, pupa, and adult of blue-bottle fly (Musca 

 votmtoria) ' l.\ & a.\ larva, pupa, and adult of Cossus ligniperda, 



