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Couplet 38
38a: Length < 1.2 mm; antenna long, thin, with loose to indistinct club; antennomeres each with a whorl of long setae at apex; wing fringed with long setae that are longer than width of wing, or wing absent. Ptillidae p.408
38b: Length variable, antenna not as in preceding entry; wings rarely with fringe longer than width of wing.
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