Carpenter et al.: Mosquitoes of Southern U. S. 245 



subequal spinules. Siphon slender, six to seven times as long as basal width; 

 pecten of about 10 to 15 rather evenly spaced teeth on basal fourth of siphon; 

 individual tooth with 2 to 5 coarse teeth on one side; paired subventral tufts 

 usually four in number and inserted beyond pecten (proximal tuft as long or 

 longer than basal width of siphon and usually double or single; second and 

 third tufts usually double or triple and inserted somewhat laterally; distal tuft 

 small, 1 to 3-branched). Anal segment longer than wide, completely ringed by 

 dorsal plate; lateral hair usually single, sometimes double; dorsal brush consist- 

 ing of a long lower caudal hair and a shorter 2 to 3-branched upper caudal tuft 

 on either side; ventral brush well-developed, confined to the barred area; gills 

 4, as long or longer than the segment, each tapering to a blunt point. 



DISTRIBUTION. — Southern United States, southward to Brazil. Southern 

 States: Alabama and Florida (96); Georgia (148); Louisiana (96); Missis- 

 sippi (125); North Carolina (35); South Carolina (64); Tennessee (125). 



BIONOMICS. — The adults are frequently taken in biting collections in Flor- 

 ida and southern Georgia, but are less inclined to bite than C. salinarius. The 

 larvae occur in ditches, grassy pools and marshes of a semipermanent or per- 

 manent nature. Larvae and adults occur throughout the year in the extreme 

 South (4th Sv. C. Med. Lab. records, 1942-1944, unpublished). 



CuLEX (CuLEx) pipiens Linnaeusi 



Culex pipiens Linnaeus, 1758, Syst. Nat., Ed., 10:602. 



ADULT FEMALE. — Very similar to C. quinquefasciatus, but usually with 

 abdominal bands more broadly joined to the lateral basal white patches. 



ADULT MALE. — Coloration similar to that of female, but with basal bands 

 of abdomen more broadly joined to the lateral basal patches and not rounded 

 on posterior margins. TERMINALIA (Fig. 135). Lobes of ninth tergite (IXT- 

 L) widely separated, only slightly raised, each bearing numerous setae. Tenth 

 sternite (X-S) crowned with numerous short pointed spines; basal arm (XS- 

 BA) variable in length, but usually represented by a short protuberance. Phal- 

 losome (Ph) formed of two large sclerotized plates connected at base. Ventral 

 arm (Ph-VA) of each plate large, wing-like (narrower and more heavily 

 sclerotized than in C. quinquefasciatus), curved outwardly, tapered to a point 

 (a much smaller pointed process, similarly curved, present laterally near middle 

 of plate on same plane as ventral arm); dorsal arm (Ph-DA) of each plate 

 long, slender, straight, truncate or bluntly rounded at tip (rarely pointed), 

 directed postero-laterally and obliquely crossing over the wing-like lateral exten- 

 sion of the ventral arm. Claspette absent. Basis tyle (Bs) nearly two and one- 

 half times as long as basal width, with outer margin curved, portion beyond 

 subapical lobe more slender, and apex bluntly rounded; vestiture of numerous 

 setae, longer on outer aspects. Subapical lobe (S-L) prominent, undivided, 

 with armature (in order from anterior margin) as follows: Two long stout 

 rods and one long more slender rod, each pointed and usually slightly hooked 



1 Consult Dyar (1928) and Edwards (1932) for synonymy of this species. 



