Carpenter et al.: Mosquitoes of Southern U. S. 217 



prominent thumb-like projection bearing numerous short setae. Dististyle (Ds) 

 approximately three-fifths as long as basistyle, broader medially; terminal claw 

 (Ds-C) slender, about one-fourth as long as dististyle. 



LARVA. (Fig. 118). — Head broader than long. Antenna less than half the 

 length of the head, slightly curved, sparsely spined; antennal tuft multiple, 

 inserted before middle of shaft, not reaching tip. Head hairs: Preantennal (A) 

 multiple, sparsely barbed, extending beyond insertion of antennal tuft; lower 

 (B) and upper (C) single; postclypeal (d) small, 3 to 4-branched; sutural 

 (e) long, single; trans-sutural (f) double or triple; supraorbital single. Lateral 

 abdominal hairs usually single on segments III to V. Comb of eighth segment 

 of about 9 to 12 thorn-shaped scales in a single curved, sometimes irregular 

 row; individual scale with a long apical spine and short lateral spinules. Siphon 

 about twice as long as wide; pecten of numerous evenly spaced teeth, extending 

 to near distal fourth of siphon; subventral tuft multiple, barbed, inserted with- 

 in the pecten. Atial segment longer than wide, completely ringed by the dorsal 

 plate; lateral hair single; dorsal brush consisting of a very long lower caudal 

 hair and a shorter multiple upper caudal tuft on either side; ventral brush well 

 developed and with one of two small tufts preceding the barred area; gills 4, as 

 long or longer than the anal segment, each tapering to a point. 



distribution. — Southern States: Alabama (96); Arkansas and Florida 

 (52); Georgia (148); Louisiana (96); Mississippi (52); North Carolina 

 (125); South Carolina (64). Other State: Texas (108). 



bionomics. — Very little is known of the habits of the adults of A. tor- 

 mentor, since they cannot be separated from A. atlanticus except by examina- 

 tion of the male terminalia. The larvae are rare and occur in temporary rain- 

 filled pools during the summer months. 



Aedes (Ochlerotatus) trivittatus (Coquillett) 



Cidex trivitiaius Coquillett. 1902, Jour. N. Y. Ent. Soc, 10:193. 



ADULT FEMALE. — Medium sized species. Head: Proboscis dark scaled; 

 palpi short, dark. Narrow median area of occiput clothed with white lanceolate 

 scales and erect pale forked scales; remainder of occiput with a few dark erect 

 forked scales and numerous broad appressed dingy-white scales (often a small 

 patch of broad brown scales present laterally, surrounded by the broad pale 

 scales). Thorax: Integument of scutum dark brown, with a pair of conspicu- 

 ous longitudinal submedian stripes of narrow white to whitish-yellow scales; the 

 submedian stripes uniting on anterior margin and often joined posteriorly on 

 prescutellar space; remaining portions of scutum and dorsal half of posterior 

 pronotum clothed with bronzy-brown lanceolate scales. Abdomen: First tergite 

 dark scaled; other tergites dark scaled with basal patches of white scales later- 

 ally. Scales of venter white to whitish-yellow. Legs: Scales dark except for pale 

 inner surfaces of femora and tibiae and a white streak usually on inner surface 

 of segment 1 of each tarsus. Wing: Scales narrow, dark brown. 



