Photo Courtesy of Jason Williams

Photo Courtesy of Jason Williams

Medium to small size

Proboscis: Dark scaled with white ring near middle

Palpi: short, dark with white scales at tip

Head: Occiput with a median patch of golden-yellow to pale golden-brown lanceolate scales follow laterally by a large patch of broad appressed white scales enclosing a small dark-scaled area.

Thorax: Integument of scutum dark brown; scutum clothed with narrow golden-brown scales becoming pale yellow to nearly silver-white on the anterior margin, the prescutellar space, and immediately above the wing bases. Scutellum with yellowish to silver-white scales and brown setae on the lobes. Pleura with small patches of broad flat grayish-white scales.

Abdomen: 1st tergite with median patch of dark scales, a few white scales often intermixed, remaining tergites dark-scaled, with narrow basal white bands dorsally and conspicuous white patches laterally; apices of the distal segments with a few pale scales. Sternites white-scaled basally, dark-scaled or speckled with white apically.

Legs: Femora and tibiae dark-scaled, pale on posterior surface; knee spots white. Hind tarsi dark segments 1 to 4 each with a broad basal white ring. Segment 5 usually entirely white. Front and middle tarsi dark with narrow basal white rings on segment 1 to 3, segments 4 and 5 with rings reduced or absent.

Wings: length 2.8 to 3.2 mm scales dark and narrow.

Bionomics: Larvae develop mostly in salt marshes in coastal areas and occasionally in near-by fresh-water pools. They are also found in inland brackish-water swamps, particularly in oil fields. They are more abundant during Summer and early Fall following high tides or combination of high tides and heavy rains. They are persistent biters and will attack during day or night. They rest in vegetation during the day. They are strong fliers and often migrate in large numbers for many miles …flight range is 5 to 40 miles.