74 



TROPICAL MEDICINE AND HYGIENE 



Anopheles. 



Cydolepteron. 



Janthinosoiiia. 



Mansonia. 



Stegomyia. 



Eretmabodites . 



8 

 Mucidus. 



Psoropko) 



FlG. 23. Various Forms of Wing-scales (Theobald). I, Scales on veins 

 and on costa in Anopheles ; 2, scales on veins in Cyclolepteron ; 3, scales on 

 veins and on costa in Janthinosoma ; 4, scales on veins in Mansonia ; 

 5, scales on veins in Slegomyia ; 6, scales on veins in Erctmapodites ; 7, scales 

 on veins and on costa in Culex ; 8, scales on veins in Mucidus ; 9, scales on 

 veins and on costa of Psorophora. 



