372 ECONOMIC ZOOLOGY AND ENTOMOLOGY 



and pupae. But often the eggs are laid in water where none of 

 the natural enemies occurs, and they then breed undisturbed 



FIG. 161. Wing of Anopheles maculipennis. (Eleven times natural size.) 





FIG. 162. A non-malarial FIG. 163. A malarial mosquito, 



mosquito, Thcobaldia incident:, Anopheles maculipennis, female, 

 male standing on the wall. standing on the wall. (About 



(About twice natural size.) 



twice natural size.) 



Such places require careful attention when fighting mosquitoes. 

 All water troughs and barrels or cisterns should be emptied 



