THE MOSQUITOES OF THE SOUTHEASTERN STATES 65 



25. (13) Not exceptionally large species; legs not markedly shaggy 27 



Very large species of striking appearance, the gallinippers (fig. 2, B) ; 



legs shaggy or with tufts of long, erect scales toward tips of femur 

 and tibia. [Side of mesonotum with an area of broad white ap- 

 pressed scales, bordered by smooth nude areas; posterior pronotal 

 lobe nude, or with very few scales or bristles.] 



Psorophora (Psorophora) 26 



26. Legs, especially the hind pair, with long, erect scales; mesonotum with 



a median stripe of golden scales (fig. 12, H) ; tarsi with basal pale 

 rings; proboscis ringed; general color yellowish— Psorophora ciliata 

 Legs much less shaggy, only tips of femora and hind tibiae with long, 

 erect scales; mesonotum without a median stripe of golden scales; 

 first two segments of hind tarsi usually with very narrow pale basal 

 rings ; proboscis not ringed ; general color bluish— Psorophora howardii 



27. Mesonotum bright yellow (both scales and integument), with two 



prominent, shiny, black spots on posterior corners; costa and vein 1 

 yellow-scaled from base to tip of subcostal vein. [Proboscis, femora, 

 and tibiae yellow, tipped with dark ; first two tarsal segments largely 

 yellow, apical segments darker.] A conspicuously yellow species; 



usually rare Aecles bimaculatus 



Not so marked 28 



28. Proboscis and tarsi ringed with white 29 



Proboscis not ringed with white 39 



29. Wing scales very broad, mixed brown and white. [Abdomen blunt ; 



femora, tibiae, and proboscis with mixed brown and white scaling.] 



Genus Mansonia 30 

 Outstanding wing scales narrow (cf. veins 2 and 4) 31 



30. Hind tibiae with a wide pale ring on apical half, and first segment of 



hind tarsi with a wide pale ring at middle ; proboscis broadly ringed ; 

 postspiracular hairs absent. Locally prevalent in Southern and 



Eastern States Mansonia perturbans 



Tibia and first segment of hind tarsi unbanded or bands indistinct; 

 pale ring on proboscis narrow ; postspiracular hairs present. Southern 

 Florida and Tropics Mansonia titillans 



31. Femora without white rings ; abdominal tergites with basal pale bands 



or lateral spots, or a longitudinal pale stripe 32 



Hind femur with a very narrow ring of white scales toward apex ; ab- 

 dominal segments pale-scaled apically, the pale scaling diffuse or 

 extending forward at sides or centrally. [Legs and wings with mixed 

 dark and pale scales, wings of some species also with spots of pale 

 scales ; spiracular and postspiracular bristles present ; claws of females 

 not toothed.] Psorophora ( Grabhamia) 36 



32. Tarsal segments with basal and apical pale rings, at least on hind tarsi. 



[Female abdomen blunt; postspiracular hairs absent.] Banded-legged 



Culex 33 



Tarsal segments without apical banding. [Abdomen tapered ; post- 

 spiracular hairs present.] Aedes {taeniorhynchus group) 34 



33. Tarsal rings broad ; femora and tibiae with a longitudinal line of white 



scales on outside ; wings usually with a patch of white scales at base 

 of costa. Taken very rarely in Louisiana and Arkansas, common in 



Western States Culex tarsalis 



Tarsal rings very narrow, apical banding limited to hind tarsi ; femora 

 and tibiae not lined with white ; wing scales entirely dark. A tropical 

 species that has been recorded once from the Florida keys 



Culex corniger 



34. Abdomen with a dorsal longitudinal stripe of yellowish scales (fig. 14) ; 



femora and tibiae speckled with white. [Mesonotum golden : proboscis 

 and hind-tarsal segments broadly ringed ; last hind-tarsal segment 



entirely white.] 35 



Abdomen with transverse dorsal bands but without a longitudinal stripe ; 

 dark portions of femora not speckled ; mesonotum with dark or 

 brownish scales, sprinkled with silver posteriorly. [Proboscis and tarsi 

 usually with rather narrow bands of white scales ; first hind-tarsal 

 segment not ringed in middle ; tip of last hind-tarsal segment usually 

 dark in southern specimens; wing scales narrow, entirely dark.] An 

 important salt-marsh species, of somewhat less than the average size 



Aedes taeniorhynchus 

 109619—39 5 



