Revision of the Neotropical genus Marbenia Malloch (Diptera: Periscelididae) Author Ale-Rocha, Rosaly Author Freitas, Geovânia Author Mathis, Wayne N. text Zootaxa 2014 3872 4 365 375 journal article 10.11646/zootaxa.3872.4.3 5d6329a6-8761-457d-8492-15db133763a9 1175-5326 225270 BBE196C1-10A1-40B6-84B3-6462134B558C Key to the species of Marbenia Malloch 1. Frons brown or pale brown with lateral margins yellow; face brown with small yellow spots ( Fig. 17 ); wing predominantly brown, with basal 1/3 yellowish and 2 hyaline spots in the brownish portion ( Fig. 19 )......... Marbenia peculiaris Malloch - Frons entirely yellow; face pale brown or yellow ( Figs 2 , 9 ); wing yellowish tinged with apical, posterior margin and a transverse band gray ( Figs 4 , 11 )............................................................................. 2 2. Scutum covered with sparse pale gray pruinescence ( Fig. 3 ); face pale brown, lacking spots, with 1 transversal furrow ( Fig. 2 ); gena and postgena brown; abdomen brown............................................ Marbenia cinerea , sp. nov. - Scutum covered by dense golden pruinescence ( Fig. 10 ); face yellow with lateral margins darkened on upper half, with 2 deep transversal furrows ( Fig. 9 ); gena and postgena yellow; abdomen pale brown................. Marbenia pallida , sp. nov.