Moderately large mosquito
Proboscis: dark, sprinkled with white scales basally and with broad median ring of pale scales.
Palpi: about one fifth as long as proboscis, dark-scaled, lightly speckled with pale scales.
Head: Occiput with pale-golden lanceolate scales and dark erect forked scales, a few pale forked scales on anterior part. Tori light brown on outer surface, darker and with a patch of grayish-white scales on inner surface.
Thorax: Integument of scutum mottled dark brown and black; scutum clothed with dark brown lanceolate scales intermixed with pale-golden lanceolate scales; The golden scales are more numerous anteriorly, laterally and on the prescutellar space. Scutellum with pale-golden scales and brown setae on the lobes. Pleura with patches of grayish-white scales. Spiracular and postspiracular bristles absent.
Abdomen: First tergite dark-scaled; remaining tergites dark-scaled, with white or pale-yellow basolateral patches and occasionally with narrow basal segmental bands of pale scales. Venter with intermixed dark and pale scales, the pale scales more numerous on the basal part of the sternites. 8th segment bluntly rounded. 8th tergite without short stout spines.
Legs: Femora dark, speckled with pale scales, the apices almost entirely dark-scaled. Hind femur with narrow subapical, more or less distinct ring of pale scales. Posterior surface of middle and hind femora predominantly pale-scaled except near apices. Front and middle tibiae dark-scaled, speckled with white, narrowly ringed with white scales at apices; hind tibia dark-scaled, speckled with white, ringed with white scales at outer third and at apex. 1st tarsal segment of all legs with narrow white ring basally and a broader white ring a little beyond middle; remaining tarsal segments each with basal half white apical half dark.
Wings: Length about 4.0 mm, scales broad, mixed dark and white.
Bionomics: The eggs are laid on the surface of water in areas of heavy emergent vegetation, after hatching the larvae attach themselves with their modified siphon to the roots or submerged stems of plants where they remain throughout development until they are ready to emerge as adults. They overwinter as larvae …adults emerge in Spring and Summer. They bite during night but will bite in shade if disturbed. They are strong fliers ( 1 to 5 miles ) and are important pest in areas near shallow with emerged aquatic vegetation. They are attracted to light traps. They can transmit Eastern Equine Encephalitis.