STRUCTURE, CLASSIFICATION, AND KEYS 



29 



Fig, X. Diagrammatic life history of three typical species, top. House mos- 

 quito. CENTER. Salt-marsh or woodland pool or fresh-water swamp mosquito. 

 BOTTOM. Malarial mosquito, key to numbers: 1, eggs; 2, hatching larvae; 3, 

 grown larvae or wrigglers; 4, pupae; 5, adults emerging and flying away. 

 In larvae and pupae note breathing tubes at surface of water. 



twice as long as broad; head width hardly more than one- 

 half width of thorax: Aedes sollicitans Walk. 

 i Found in salt or brackish water; breathing tube about 

 one and one-half times as long as broad; head about two- 

 thirds width of thorax: Aedes taeniorhynchus Wied. 

 j Found in salt or brackish water ; breathing tube a little 

 less than three times as long as broad; head globular 

 about one-half width of thorax: Aedes cantator Coq. 



