32 



MOSQUITO ERADICATION 



quadrimaculatus, except that punctipennis appears to be some- 

 what less fastidious about the character of the water in which it 

 breeds. 



A. punctipennis apparently does not enter houses so freely as 

 A. quadrimaculatus and A. crucians. It is generally a porch- 

 biter, and ordinarily will be found most abundantly in the early 

 evening. It does not appear to fly so far as A. quadrimaculatus. 



This species probably is the most common of the North 

 American Anopheles. 



A. OCCIDENTALIS, D. AND K. 



This mosquito, the common malaria carrier of the Pacific 

 coast, has been considered by some authors to be identical with 



A. quadrimaculatus. While the gen- 

 eral appearance is quite similar to that 

 of A. quadrimaculatus, there are, accord- 

 ing to Dyar, well-defined differences in 

 the male genitalia. 



It appears that this mosquito is of 

 sanitary importance only west of the 

 Rockies. 



THE CTJLICINAE 



Fig 



32. — Anopheles puncti- 

 pennis, female. 



The sub-family, Culicinae, is sub- 

 divided into two genera — the Culex 

 and the Aedes. Species belonging to 

 both of these genera transmit disease. 



Adults of this sub-family may be distinguished from adult 

 A?wpheles by the fact that the palpi are long in the male and 

 short in the female, while the Anopheles of both sexes have long 

 palpi. Another differentiation is the fact that Culicines have 

 flat abdominal scales, while A7iopheles do not. As already 

 intimated, the resting position of the Culicines is also very 

 different from that of the Anopheles. 



The difference between Anopheline and Culicine larvae has 

 already been indicated. 



The chief differences between Culex and Aedes may be summed 

 up as follows: 



Adult Culex and Aedes are best distinguished by the shape of 

 the abdomen; in the Culex, the abdomen is blunt, with short 

 cerci; in the Aedes, it is tapered, and pointed, with distinct cerci. 



