40 



MOSQUITO ERADICATION 



species is very widely distributed and breeds in almost any kind 

 of water, apparently preferring water that contains sewage. 

 It will, on occasions, breed in salt water, but it is preferentially 

 a domestic insect. It enters inhabited houses freely and bites 

 all night. The adults resemble C. fatigans so closely that it is 

 difficult to distinguish them. The males differ most in the 



Fig. 40. — Adult of Aedes vexans. (After John B. Smith, New Jersey Agricul- 

 tural Experiment Stations.) 

 1, adult female; 2, anterior; 3, middle, and 4, posterior, claws of the male. 

 All are greatly enlarged. 



genitalia; the pipiens females have the abdominal banding 

 continuous, while the females of fatigans generally have the 

 pale bands interrupted at the sides. The life history of this 

 mosquito and its habits are very similar to those of C. fatigans. 

 Culex restuans, Theob., is quite similar to C. pipiens in appear- 

 ance, being distinguished from it only by the fact that, under a 

 magnifying glass, two white spots are often noticeable on top of 

 the thorax and in front of the other white marks. C. restuans 



