1. Thorax. Scutum with a patch of white scales on anterior half (Fig. 99); paratergite bare (Fig. 100). Leg. Hindtarsomeres entirely dark (Fig. 101). Head. Palpomere 4 without white scales at apex (Fig. 102)..... Ochlerotatus (Finlaya) niveus subgroup a

Thorax. Scutum with various patterns of white scales (Fig. 103); paratergite with broad white scales (Fig. 104). Leg. Hindtarsomeres with basal pale bands (Fig. 105). Head. Palpomere 4 with white scales at apex (Fig. 106).......................................... 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. 107); mesepimeron with two well separated white scale patches (Fig. 108). Leg. Anterior portion of midfemur with longitudinal white stripe (Fig. 109). Head. Clypeus with white scales (Fig. 110)............................. Aedes (Stegomyia) aegypti b

Thorax. Scutum with narrow median­longitudinal white stripe (Fig. 111); mesepimeron with white scale patches not separated, forming V­shaped white patch (Fig. 112). Leg. Anterior portion of midfemur without longitudinal white stripe (Fig. 113). Head. Clypeus without white scales (Fig. 114)................................................. .................................................................................... Aedes (Stegomyia) albopictus b