404 



TRANSFORMATIONS OF INSECTS. 



are called "fly blows," increase in size with very great rapidity 

 if they have sufficient food ; and there is some truth in the 



THE METAMORPHOSES OF THE MEAT FLIES. 



{Calliphora vomitoiHa and Sarcophaga caniaria.) 



saying that a pair of maggots will cat up a carcase as soon as 

 a lion, for the reproductive powers of the female are enormous. 



The Bot Flies are very extraordinary creatures. They are 

 large velvety flies, which have very small antennae and a rudi- 



