INSECTS AND OTHER SMALL ANIMALS 309 



life history of the mosquito should be understood in 

 order to combat the insect effectively. A mass of 



FIG. 1 60. Metamorphosis of the Mosquito. 

 Eggs, larva, later stage on the raft, and adult. (Burnett.) 



eggs somewhat boat-shaped is laid in the water. In 

 a few days they hatch into larvae, called wigglers. 

 The wiggler breathes by means of a tube which at 

 intervals is thrust up into the air through the sur- 

 face of the water. After changing the skin two or 



