ANOPHELINE OR MALARIA MOSQUITOES 43 



corrugated edges extending nearly the length of the egg. 

 The individual Culex egg tapers decidedly at the 

 upper end and terminates at the base in a globular 

 organ called the " micropilar apparatus" (Fig. 18). 



The Larvae. - -The larvae of Culicinc mosquitoes are 

 always suspended from the surface of the water at 





a decided angle, with only 

 one portion (the anal si- 

 phon) touching the surface 

 film, while in Anophelinae 



Fig. 19. Mosquito larva, in natural th \ arv3e ]j e horizontal, 

 position in the water, (a) larva or wng- 



gler, of Culicine mosquito; (b) larva oi : the J^ ^ J east severa l bodv 



Anophehne or malaria bearing mosquito. J 



segments coming dorsally 

 in contact with the film (Fig. 19). At the points 

 of contact will be seen prominent fan-shaped hairs. 

 The eighth abdominal segment in both groups is pro- 

 vided with a specialized organ through which the 

 trachea (breathing organs) come in contact with the 

 outer air. In the Culicinae this apparatus is prolonged 

 into a definite breathing tube (siphon), while in the 

 Anophelinae this tube is absent, or only slightly pro- 

 tuberant, and not chitinous, as in the Culicinae. 



