40 ANIMAL BIOLOGY 



takes no food and in a few days gives rise to the mature 

 insect. 



FIG. 36. Egg raft and larvae of the mosquito Culex pungens. bt, breath- 

 ing tube; e t two eggs enlarged. (After Howard.) 



Mosquito larvae are commonly found in stagnant water 

 which contains more or less decaying vegetable matter. 

 They are not uncommon in rain-water barrels, cisterns 



FIG. 37. Pupa of Culex (at left) and Anopheles (at right) greatly 

 enlarged. (After Howard.) 



and shallow wells, and may even live in cesspools. A few 

 species live in salt marshes. The male mosquitoes may 



