440 



MOSQUITOES 



Culex, Aedes, etc. 



EGGS 



Eggs laid singly on surface of water; 

 provided with a partial envelope, more 

 or less inflated, acting as a " float." 



Eggs laid in rafts or egg-boats, or 

 singly on or near water, or where water 

 may accumulate; never provided with 

 a " float." 



LARVAE 



LarvsB have no long breathing tube or 

 siphon; rest just under surface of water 

 and lie parallel with it. 



Larvae have distinct breathing tube 

 or siphon on 8th segment of abdomen; 

 hang from surface film by this siphon, 

 except in Mansonia, which obtains air 

 from aquatic plants. 



PUP^B 



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



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

 from surface of water. 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. 



RESTING 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. Proboscis not held in straight 

 line with body, giving " hump-backed " 

 appearance. 

 FIG. 199. 



