THE POWERI GROUP (males of chaussieri and poweri unknown) 41(8). Hindtibia with a white stripe on ventral surface in basal area (Figs. 16 B,C; 17B,C; 18A,B,C; 19B,C; 20B,C; 21A,B,C; 22B; 23B,C)................................................ 42 Hindtibia without a white stripe on ventral surface in basal area (Fig. 25 B).......... .................................................................................................................. chaussieri 42(41). Scutum with a large (crescent­shaped) patch of pale yellow scales on fossal area, fossal pale yellow patch with anterior end extending along scutal margin towards the median pale yellow stripe (Fig. 16 A)............................................................. 43 Scutum with a large patch of broader crescent­shaped white scales on fossal area, fossal white patch without anterior end extending along scutal margin towards the anterior median white spot (Figs. 17 A; 19A; 22A; 24A,B)................................. 44 43(42). White knee­spot absent on hindfemur (Figs. 16 B,C) ................................. angustus White knee­spot present and well developed on hindfemur (Fig. 18 A) .. mpusiensis 44(42). Scutum with anterior median white spot of narrow scales; hindtarsomere 5 all white (Figs. 17 A,B,C).......................................................................................... 45 Scutum with anterior median white spot of broad scales; hindtarsomere 5 all dark (Figs. 19 A; 22A; 24A,B; 18C; 19B,C; 20B,C; 21A,B,C; 22B; 23B,C)............... 46 45(44). Midtibia with a white stripe on ventral surface in basal area (Figs. 17 B,C)............ .................................................................................................................. usambara Midtibia without a white stripe on ventral surface in basal area (Fig. 18 B)........................................................................................................................... ethiopiensis 46(44). Midtarsomeres 1 and 2 with white stripe on posterior surface (Figs. 24 C1,2; 24D1,2)..................................................................................................................47 Midtarsomeres 1 and 2 without white stripe on posterior surface (Figs. 24 C3–6; 24D3–5)............................................................................................................... 48 47(46). Hindtarsomere 3 with basal 0.25 or more white on dorsal surface (Figs. 21 A,B)... ................................................................................................................... calceatus Hindtarsomere 3 with basal 0.17 or less white on dorsal surface (Figs. 21 C; 22B) ....................................................................................................................... ledgeri 48(46). Midtibia with a white stripe on ventral surface in basal area (Figs. 18 C; 19B,C) 49 Midtibia without a white stripe on ventral surface in basal area (Figs. 20 B,C; 23B,C)...................................................................................................................50 49(48). Female midtarsomere 2 with basal 0.9 or more white on dorsal surface (Fig. 19 C) ....................................................................................................................... poweri Female midtarsomere 2 with basal 0.6 or less white on dorsal surface; male midtarsomere 2 with basal 0.35 or less white on dorsal surface (Figs. 19 B; 18C)......... ........................................................................................................... hogsbackensis 50(48). Midtarsomere 2 with basal 0.4 or less white on dorsal surface (Figs. 23 B,C)........ ................................................................................................................... contiguus Midtarsomere 2 with basal 0.66 or more white on dorsal surface (Figs. 20 B,C).... ...................................................................................................................... langata

Published as part of Yiau-Min Huang, 2004, The subgenus Stegomyia of Aedes in the Afrotropical Region with keys to the species (Diptera: Culicidae), pp. 1-120 in Zootaxa 700 on pages 27-28, DOI: 10.5281/zenodo.166051