Carpenter et al. : Mosquitoes of Southern U. S. 97 



white scales. Scutum densely matted with large elliptical scales appearing 

 coppery-brown to metallic blue-green in different lights. Abdomen: Abdomen 

 usually laterally compressed, the dorsum dark and the venter yellowish-white 

 to silvery-white, the dark and white scales separated laterally in a straight 

 longitudinal line; the scales of the dorsum dark brown, with coppery to metallic 

 blue-green reflection. Legs: Knee spots absent. Femora and tibiae dark scaled 

 on outer surfaces, with metallic blue-green reflections, the inner surfaces largely 

 pale. Fore-tarsus entirely dark; mid-tarsus with segments 3 and 4 and apex of 

 2 white on one side; each segment of hind tarsus basally streaked with white 

 on inner surface. Wing: Scales narrow, dark. 



ADULT MALE. — Coloration, palpi and antennae similar to those of female. 

 TERMINALIA (Fig. 49). Lohes of ninth tergite (IXT-L) small, sclerotized, 

 separated by about the width of one lobe; each lobe armed with a few short, 

 stout spines. Tenth sternite (X-S) moderately sclerotized, with a few short, 

 subapical setae. Phallosome (Ph) open ventrally, closed dorsally, about two- 

 thirds as long as broad, narrower at base, somewhat broadened hood-like api- 

 cally; each plate with three small teeth at apex. Claspette absent. Basistyle (Bs) 

 about three times as long as basal width, curved, narrower beyond middle; 

 general vestiture consisting of scales and short setae; three very long, strong 

 setae arising dorsally near base. Basal lobe (B-L) triangular, bearing a spine 

 and numerous small setae (this structure is probably not a true basal lobe, but 

 a modification of the mterbasal fold); apical lobe absent. Dististyle (Ds) 

 nearly as long as basistyle and consisting of a short, stout stem and a greatly 

 enlarged apical head; the head about one and one-half times as long as the 

 stem. Structural details of head of diitistyle as illustrated. 



LARVA. (Fig. 50). — Head nearly as long as broad. Antenna about one- 

 third as long as head, smooth; antennal tuft represented by a single hair on 

 outer third of shaft, extending beyond tip. Head hairs: Preantennal (A) 

 single, about as long as antenna; lower (B) and upper (C) single; postclypcal 

 (d) single, nearly as long as upper (C); sutural (e) single; trans-siitural (f) 

 3 to 4-branched; supraorbital single or branched distally. Upper lateral abdom- 

 inal hairs long, multiple on segments I and II, single on III to VI. Comb of 

 eighth segment of numerous scales in a single row, the scales becoming pro- 

 gressively somewhat smaller ventrally, individual scale elongate, evenly fringed 

 with minute spinules. Siphon about six times as long as basal width; pecten 

 absent; a row of six small 1 to 2-branched tufts dorsally, a larger 2 to 3- 

 branched tuft at basal fourth and two or three small 1 to 2-branched tufts 

 apically. dorsal preapical spine stout, nearly as long as apical width of siphon. 

 Ayial segments about as wide as long; dorsal plate extending well down the 

 sides; lateral hair long, double; dorsal brush consisting of a long 2-branched 

 upper and lower caudal tuft on either side; a ventrolateral tuft with one or 

 two long and three or four shorter hairs on either side; gills 4, swollen, much 

 longer than the segment, blunt at tips. 



DISTRIBUTION. — Southern Florida (52); Central America and the West 

 Indies. 



BIONOMICS. — The habits of W. vanduzeei are very similar to those of W. 

 mitchellii with which it is commonly associated in its breeding places. 



