Basistyle either without a shoulder near apex, or 

 the shoulder, if present, bearing only narrow 



spines 13 



13. Basistyle with a stout rodlike structure on mesal 

 face near middle; dististyle with apical half very 

 wide, its terminal spine stout and spurlike (Fig. 

 68) Mansonia perturbans 



Basistyle frequently with one or more stout hairs 

 on mesal face near middle or base, but never with 

 a rodlike structure (Fig. 74); dististyle not as 

 in Fig. 68 Aedes 



Key +0 Species of AEDES (Males) 



I. Dististyle arising before apex of basistyle, the por- 

 tion of the basistyle which extends beyond the 



dististyle forming an apical cone (Fig. 75) 



cinereus 



Dististyle arising at extreme apex of basistyle (Fig. 

 73) 2 



Dististyle wide near apex, terminating in a sharp 

 projection that is nearly as long as terminal spine; 

 claspette a small bushy lobe (Fig. 73) . . . .vexans 



Dististyle narrow at apex, tipped by terminal spine 

 (F'ig. 74) 3 



Claspette absent (Fig. 74) aegypti 



Claspette present (Fig. 76-100) 4 



Stem of claspette branched near tip, one branch end- 

 ing in a hair, the other bearing the filament (Fig. 

 79c ) ; filament massive and contorted, thin and pale 

 thibauld 



Stem of claspette with an unbranched apex bearing 

 the filament (Fig. 78C 84f); filament of various 

 sizes and shapes, but never both massive and con- 

 torted 5 



Male genitalia. 



Fig. 68.- — Maiisonia ptrlurbiDn. venlral aspect, anj lateral as- 

 pect of dististyle. 



Fig. 69. — Uratmlnvnia sapphiriiia: A. ventral aspect. anJ lateral 

 aspect of dististyle; B, mesal aspect of clasper, with phallosome and 

 other me.sal structures removed. 



Fig. "0. — Orthopodomyia sigiiifera. ventral aspea. 

 Fig. ''1. — W'yeomyia smilhi: A. ventral aspea; B. lateral aspect. 

 The apical contorted structure is the dististyle. 



Fig. ~1. — To\orh)>ichites rutilus septentrionalis. ventral aspea. 



The internal phallosome is not shown. 



16 



