ANOPHELINE OR MALARIA MOSQUITOES 51 



21). Such conditions arc commonly produced along 

 smaller creeks flowing sluggish')- through meadows, or 

 by lateral seep- 

 age from irri- 

 gation ditches. 

 Often land that 

 is soaked with- 

 out actually 

 forming open 

 pools is made to 

 produce many 

 •mosquitoes 

 through the 

 hoof prints of 

 cattle and 

 horses, i.e. these 

 animals leave 

 indentations 

 behind which 

 fillinwithwater, 

 and proper con- 

 ditions for mos- 

 quito breeding 

 are produced. 



Receding 

 streams fre- 

 quently leave 



chains of pools, rich in algae, along the edges, espe- 

 cially if city wastes are involved ; in these pools the 



Fig. 25. Anopheles (malaria bearing) mosquitoes were 

 found breeding in stagnant water in the gutters of a main 

 thoroughfare. 



