440 



MOSQUITOES 



Anopheles 





Culex, Aedes, etc. 



EGGS 

 Eggs laid singly on surface of water; Eggs laid in rafts or egg-boats, or 



provided with a partial envelope, more singly on or near water, or where water 

 or less inflated, acting as a "float." may accumulate; never provided with 



a " float." 



LARViB 



Larvse have no long breathing tube or 

 .siphon; rest just under surface of water 

 and lie parallel with it. 



Larvas have distinct breathing tube 

 or siphon on 8th segment of abdomen; 

 hang from surface film by this siphiMi, 

 except in Mansonia, which obtains air 

 from aquatic plants. 



PVVJE 

 Pupae have short breathing truni- Pupae have breathing trumpets of va- 



pets; usually do not hang straight down rious length; often hang nearly straight 

 from surface of w;iter. down from surface of water. 



"^=^'*^: 



:^ 



HEADS OF ADULTS 

 Palpi of both male and female long Palpi of female always much shorter 



and jointed, equaling or exceeding the than proboscis, those of male usually 

 proboscis in both sexes. long, but sometimes short. 



UESTING POSITION OF ADULT 



Adult rests with body more or less at 

 angle with surface, the proboscis held 

 in .straight line with body. 



Adult usually rests with body parallel 

 to surface, though sometimes at an 

 angle. Pr()bo.scis not held in straight 

 line with body, giving " hump-backed " 

 appearance. 



Fig. 199. 



