1. Thorax. Scutum with median­longitudinal pale stripe (Fig. 125 A) and dorsocentral longitudinal pale stripes (Fig. 125 B); scutellum without broad flat white scales on all lobes forming a complete transverse band (Fig. 125 C). Leg. Hindtibia with a patch of white scales about 1 / 3 distance from base (Fig. 126)......................................................................................................... Ochlerotatus (Gymnometopa) mediovittatus a

Thorax. Scutum with median­longitudinal white stripe (Fig. 133) or submedian­longitudinal white stripes (Fig. 127 B); scutellum with broad flat white scales on all lobes forming a complete transverse band (Fig. 127 C). Leg. Hindtibia without a patch of white scales (Fig. 128)................................................................................ 2

2 (1). Thorax. Scutum black or brown with a pair of submedian­longitudinal white stripes, but without median­longitudinal white stripe, or with white lyre­shaped markings (Fig. 129); mesepimeron with two well separated white scales patches (Fig. 130). Leg. Anterior portion of midfemur with longitudinal white stripe (Fig. 131). Head. Clypeus with white scales (Fig. 132).............................. Aedes (Stegomyia) aegypti b

Thorax. Scutum with narrow median­longitudinal white stripe (Fig. 133); mesepimeron with white scale patches not separated, forming V­shaped white patch (Fig. 134). Leg. Anterior portion of midfemur without longitudinal white stripe (Fig. 135). Head. Clypeus without white scales (Fig. 136) Aedes (Stegomyia) albopictus b