BRANCH ARTHROPODS; CLASS 1NSECTA : THE INSECTS 2 3 



coming often to the surface to breathe), and the other 

 the real tip of the abdomen. The wriggler, although 

 heavier than water, can hang suspended from the surface 

 film by the tip of its breathing-tube. It changes in a few 



FIG. 67. The mosquito, Culex sp. ; showing eggs Con surface of water), 

 larvae (long and slender, in water), pupa (large headed, at surface), 

 and adult (in air). (From living specimens.) 



