Carpenter et al.: Mosquitoes of Southern U. S. 



149 



(Bs) about one and one-half times as long as wide, nearly hemispherical in 

 shape with outer margin strongly curved; apex lobiform, directed mesad, bear- 

 ing a dense patch of setae; vestiture of basistyle consisting primarily of numer- 

 ous scales on basal half and long and short setae on apical half. Dististyte 

 (Ds) about half as long as basistyle, the basal half constricted, the apical half 

 strongly swollen, the tip rounded; a minute sub-ventral lobe bearing a few 

 small setae present at apical fourth near outer margin; terminal claw (Ds-C) 

 short, peg-like, inserted at tip of dististyle. 



Fig. 77. Larva of Psorophora longipalpus Roth. A, Terminal segments. 

 B, Comb scale. C, Pecten tooth. D, Head. 



