Carpenter et al. : Mosquitoes of Southern U. S. 237 



represented in the southern United States by comparatively few species belong- 

 ing to three subgenera, Culex, Melanoconion, and Neoculex. 



SALIENT characters. — Adult: A pair of pad-like pulvilli at the bases of 

 the tarsal claws. Tarsal claws of female without teeth. Pharyngeal bar of female 

 distinctly toothed. Eyes contiguous above antennae. Spiracular and postspiracu- 

 lar bristles absent. Squama fringed. Tip of abdomen of female bluntly 

 rounded, the eighth segment not retracted. Male Terminalia: Phallosome 

 formed of a pair of heavily sclerotized, variously divided plates. Tenth sternite 

 crowned with numerous short spines or a comb-like row of teeth. Claspette 

 absent. Subapical lobe of basistyle present; and armed with modified spines and 

 setae. Larva: Head wider than long. Comb of eighth segment usually consist- 

 ing of many scales in a triangular patch. Siphon with pecten and several pairs 

 of subventral tufts. Anal segment completely ringed by the dorsal plate. 



Keys to the Species 



adult females 



1. Proboscis and tarsi ringed with white 2 



Proboscis and tarsi dark scaled 3 



2. White tarsal rings broad; femora and tibiae each with a longitudinal line of 



white scales on outer surface; a few white scales present on costa and subcosta 



tarsalis Coq., p. 256 



White tarsal rings very narrow; femora and tibiae dark on outer surfaces; 

 wing scales entirely dark hahamcnsis D. and K., p. 240 



3. Abdominal segments each with an apical triangular patch of white scales on 



either side, usually joined by a narrow dorso-apical band of similar scales 



apicahs Adams, p. 271 



Abdominal segments with white scaling basal when present 4 



4. Occiput dorsally with broad appressed scales, sometimes limited to a narrow 



border back of eyes; wing scales slightly or distinctly broadened, at least on 



vein 2 (Subgenus Melonoconion) erraticus (D. and K.). p. 262 



pllosus (D. and K.), p. 268 



peccalor D. and K., p. 265 



atrahis Theob., p. 260 



Occiput dorsally without broad, appressed scales; wing scales narrow 5 



5. Abdominal segments each with a broad basal band of whitish scales dorsally 6 



Abdominal segments without broad basal whitish bands dorsally; pale scaling, if 



present, in very narrow bands or restricted to lateral angles 7 



6. Abdominal bands broadly rounded on posterior margins, constricted laterally, 



rather narrowly joining or entirely disconnected from the lateral patches; 

 scales of scutum somewhat coarse, golden; scutum lacking a pair of small 



pale-scaled submedian spots near middle quinquefasciahis Say, p. 247 



pipiens Linn., p. 245 

 Abdominal bands with posterior borders nearly straight across, broadly joining 

 the lateral patches (particularly on segments 3 - 5) ; scales of scutum fine, 

 golden-brown; scutum usually with a pair of small pale-scaled submedian 

 spots near middle reshtans Theob., p. 250 



7. Lateral basal patches of abdomen dingy-yellow, rather poorly defined; abdom- 



inal segment usually with very narrow dingy-yellow basal bands dorsally, and 

 with the apices of the segments more or less blended with yellowish scales, 

 VII either primarily or entirely clothed with dingy-yellow scales; scales of 

 scutum golden brown; pleura with several groups of broad pale scales, each 

 group usually comprised of more than 6 scales salinarius Coq., p. 253 



