Ctenarytaina Ferris & Klyver, 1932

Type species: Ctenarytaina fuchsiae (Maskell)

Key to adults of Ctenarytaina in French Polynesia

1 Head with genae conical, diverging, with more acute apices; forewing broad (ratio WL:WW <2.4) and remaining broad in apical half with broadly rounded apex, cell cu 1 higher and narrower (ratio CUR <2.5) with arching vein Cu 1a .................................................................... C. remota Tuthill, 1956 (on Hivaoa, Marquesas Islands)

- Head with genae broad, converging and mostly contiguous with bluntly rounded apices; forewing narrower (ratio WL:WW> 2.4) and increasingly narrow in apical half to narrowly rounded apex, cell cu 1 lower and wider (ratio CUR> 2.5) with more or less straight vein Cu 1a.................................................................................. 2

2 Smaller species, length including wings <2 mm; head with vertex longer and narrower (ratio VL:VW> 0.5) and notably narrowed anteriorly, genae very short (see Fig. 1c in Tuthill 1942) (ratio VL:GC> 0.3)....................................................................................... C. lulla (Tuthill, 1942) (on Huahine, Society Islands)

- Larger species, length including wings> 2 mm (Fig. 1N); head with vertex shorter and wider (ratio VL:VW <0.5), not notably narrowed anteriorly (Fig. 1G, 1H), genae longer (ratio VL:GC <0.3)........ C. elinae sp. nov. (on Tahiti, Society Islands)